diff --git a/plugins/include/Vexd_Utilities.inc b/plugins/include/Vexd_Utilities.inc
index 8daee531..ff816a6a 100755
--- a/plugins/include/Vexd_Utilities.inc
+++ b/plugins/include/Vexd_Utilities.inc
@@ -1,10 +1,15 @@
 /* Vexd Utility backwards compatibility
 *
-* (c) 2004, the AMX Mod X Development Team
+* by the AMX Mod X Development Team
 *
 * This file is provided as is (no warranties).
 */
 
+#if defined _Vexd_Utilities_included
+  #endinput
+#endif
+#define _Vexd_Utilities_included
+
 #include <engine>
 
 stock Entvars_Get_Int(iIndex, iVariable)
diff --git a/plugins/include/amxconst.inc b/plugins/include/amxconst.inc
index 8e6e81d1..93b5b08b 100755
--- a/plugins/include/amxconst.inc
+++ b/plugins/include/amxconst.inc
@@ -1,11 +1,19 @@
-/* AMX Mod X
+/* AMX Mod X constants
 *
-* (c) 2002-2004, OLO
-*  modified by the AMX Mod X Development Team
+* by the AMX Mod X Development Team
+*  originally developed by OLO
 *
 * This file is provided as is (no warranties).
 */
 
+#if defined _amxconst_included
+  #endinput
+#endif
+#define _amxconst_included
+
+#define AMX_VERSION 0.1
+new AMX_VERSION_STR[] = "0.1"
+
 /* Uncomment if you are not using Steam */
 //#define NO_STEAM
 
diff --git a/plugins/include/amxmisc.inc b/plugins/include/amxmisc.inc
index df92b764..4b453446 100755
--- a/plugins/include/amxmisc.inc
+++ b/plugins/include/amxmisc.inc
@@ -1,11 +1,16 @@
 /* AMX Mod X misc.
 *
-* (c) 2002-2004, OLO
-*  modified by the AMX Mod X Development Team
+* by the AMX Mod X Development Team
+*  originally developed by OLO
 *
 * This file is provided as is (no warranties).
 */
 
+#if defined _amxmisc_included
+  #endinput
+#endif
+#define _amxmisc_included
+
 stock cmd_access(id,level,cid,num) {
   if ( ((get_user_flags(id)&level)!=level) && (id!=(is_dedicated_server()?0:1)) ) {
     console_print(id,"You have no access to that command")
@@ -24,10 +29,10 @@ stock access(id,level)
   return (get_user_flags(id) & level)
 
 /* Flags:
- *  1 - obey immunity
- *  2 - allow yourself
- *  4 - must be alive
- *  8 - can't be bot */
+*  1 - obey immunity
+*  2 - allow yourself
+*  4 - must be alive
+*  8 - can't be bot */
 stock cmd_target(id,const arg[],flags = 1) {
   new player = find_player("bl",arg)
   if (player) {
diff --git a/plugins/include/amxmod.inc b/plugins/include/amxmod.inc
index c01a8719..1e4bd4fe 100755
--- a/plugins/include/amxmod.inc
+++ b/plugins/include/amxmod.inc
@@ -1,24 +1,30 @@
 /* AMX Mod X functions
 *
-* (c) 2002-2004, OLO
-*  modified by the AMX Mod X Development Team
+* by the AMX Mod X Development Team
+*  originally developed by OLO
 *
 * This file is provided as is (no warranties).
 */
 
+#if defined _amxmod_included
+  #endinput
+#endif
+#define _amxmod_included
+
 #include <core>
 #include <float>
 #include <amxconst>
 #include <string>
 #include <file>
 #include <vault>
+#include <fun>
 
 /* Function is called just after server activation.
- * Good place for configuration loading, commands and cvars registration. */
+* Good place for configuration loading, commands and cvars registration. */
 forward plugin_init();
 
 /* Function is called when all plugin_init from plugins
- * were called, so all commmands and cvars should be already registered. */
+* were called, so all commmands and cvars should be already registered. */
 forward plugin_cfg();
 
 /* Function called before plugin unloading (server deactivation) */
@@ -37,7 +43,7 @@ forward client_infochanged(id);
 forward client_connect(id);
 
 /* Called when client gets valid STEAM id (usually
- * between client_connect() and client_putinserver()). */
+* between client_connect() and client_putinserver()). */
 forward client_authorized(id);
 
 /* Called when client is disconnecting from server. */
@@ -53,7 +59,7 @@ forward client_putinserver(id);
 native register_plugin(const plugin_name[],const version[],const author[]);
 
 /* Gets info about plugin by given index.
- * Function returns -1 if plugin doesn't exist with given index. */
+* Function returns -1 if plugin doesn't exist with given index. */
 native get_plugin(index,filename[],len1,name[],len2,version[],len3,author[],len4,status[],len5);
 
 /* Returns number of all loaded plugins. */
@@ -78,8 +84,8 @@ native set_localinfo(const info[],const value[]);
 native get_localinfo(const info[],output[],len);
 
 /* Shows text in MOTD window. When there is no header, the MOTD title 
- * will be the name of server. If message is filename, then a contents
- * of this file will be displayed as MOTD. */
+* will be the name of server. If message is filename, then a contents
+* of this file will be displayed as MOTD. */
 native show_motd(player,const message[],const header[]="");
 
 /* Sends message to player. Set index to 0 to send text globaly. */
@@ -95,27 +101,27 @@ native console_print(id,const message[],{Float,_}:...);
 native console_cmd(id,const cmd[],{Float,_}:...);
 
 /* Registers event on which a given function will be called
- * Flags:
- * "a" - global event.
- * "b" - specified.
- * "c" - send only once when repeated to other players.
- * "d" - call if is send to dead player.
- * "e" - to alive.
- * Examples for conditions:
- * "2=c4" - 2nd parameter of message must be sting "c4".
- * "3>10" - 3rd parameter must be greater then 10.
- * "3!4" - 3rd must be different from 4.
- * "2&Buy" - 2nd parameter of message must contain "Buy" substring.
- * "2!Buy" - 2nd parameter of message can't contain "Buy" substring. */
+* Flags:
+* "a" - global event.
+* "b" - specified.
+* "c" - send only once when repeated to other players.
+* "d" - call if is send to dead player.
+* "e" - to alive.
+* Examples for conditions:
+* "2=c4" - 2nd parameter of message must be sting "c4".
+* "3>10" - 3rd parameter must be greater then 10.
+* "3!4" - 3rd must be different from 4.
+* "2&Buy" - 2nd parameter of message must contain "Buy" substring.
+* "2!Buy" - 2nd parameter of message can't contain "Buy" substring. */
 native register_event(const event[],const function[],const flags[],cond[]="", ... );
 
 /* Registers log event on which the given function will be called
- * Examples for conditions:
- * "0=World triggered" "1=Game_Commencing"
- * "1=say"
- * "3=Terrorists_Win"
- * "1=entered the game"
- * "0=Server cvar" */
+* Examples for conditions:
+* "0=World triggered" "1=Game_Commencing"
+* "1=say"
+* "3=Terrorists_Win"
+* "1=entered the game"
+* "0=Server cvar" */
 native register_logevent(const function[], argsnum,  ... );
 
 /* Sets format for hudmessage. */
@@ -128,9 +134,9 @@ native show_hudmessage(index,const message[],{Float,_}:...);
 native show_menu(index,keys,const menu[], time = -1);
 
 /* Gets value from client messages.
- * When you are asking for string the array and length is needed (read_data(2,name,len)).
- * Integer is returned by function (new me = read_data(3)).
- * Float is set in second parameter (read_data(3,value)). */
+* When you are asking for string the array and length is needed (read_data(2,name,len)).
+* Integer is returned by function (new me = read_data(3)).
+* Float is set in second parameter (read_data(3,value)). */
 native read_data(value, {Float,_}:... );
 
 /* Returns number of values in client message. */
@@ -140,18 +146,18 @@ native read_datanum();
 native read_logdata(output[],len);
 
 /* Returns number of log arguments. 
- * Can be called only in plugin_log() forward function. */
+* Can be called only in plugin_log() forward function. */
 native read_logargc();
 
 /* Gets log argument indexed from 0.
- * Can be called only in plugin_log() forward function. */
+* Can be called only in plugin_log() forward function. */
 native read_logargv(id,output[],len);
 
 /* Parse log data about user ( "Butcher<5><BOT><TERRORIST>" etc. ). */
 native parse_loguser(const text[], name[], nlen, &userid = -2, authid[] = "", alen = 0, team[]="", tlen=0);
 
 /* Prints message to server console.
- * You may use text formating (f.e. server_print("%-32s %.2f!","hello",7.345)) */
+* You may use text formating (f.e. server_print("%-32s %.2f!","hello",7.345)) */
 native server_print(const message[], {Float,_}:...);
 
 /* Returns 1 or 0. */
@@ -179,13 +185,13 @@ native is_dedicated_server();
 native is_linux_server();
 
 /* If player is not attacked function returns 0, in other
- * case returns index of attacking player. On second and third
- * parameter you may get info about weapon and body hit place. */
+* case returns index of attacking player. On second and third
+* parameter you may get info about weapon and body hit place. */
 native get_user_attacker(index,...);
 
 /* If player doesn't hit at anything function returns 0.0,
- * in other case the distance between hit point and player is returned.
- * If player is aiming at another player then the id and part of body are set. */
+* in other case the distance between hit point and player is returned.
+* If player is aiming at another player then the id and part of body are set. */
 native Float:get_user_aiming(index,&id,&body,dist=9999);
 
 /* Returns player frags. */
@@ -207,7 +213,7 @@ native get_user_index(const name[]);
 native get_user_ip(index,ip[],len, without_port = 0);
 
 /* Returns id of currently carried weapon. Gets also 
- * ammount of ammo in clip and backpack. */
+* ammount of ammo in clip and backpack. */
 native get_user_weapon(index,&clip,&ammo);
 
 /* Gets ammo and clip from current weapon. */
@@ -217,27 +223,27 @@ native get_user_ammo(index,weapon,&clip,&ammo);
 native num_to_word(num,output[],len);
 
 /* Returns team id. When length is greater then 0
- * then a name of team is set. */
+* then a name of team is set. */
 native get_user_team(index, team[]="", len = 0);
 
 /* Returns player playing time in seconds. 
- * If flag is set then result is without connection time. */
+* If flag is set then result is without connection time. */
 native get_user_time(index, flag = 0);
 
 /* Gets ping and loss at current time. */
 native get_user_ping(index, &ping, &loss);
 
 /* Gets origin from player.
- * Modes:
- * 0 - current position.
- * 1 - position from eyes (weapon aiming).
- * 2 - end position from player position.
- * 3 - end position from eyes (hit point for weapon). 
- * 4 - position of last bullet hit (only CS). */
+* Modes:
+* 0 - current position.
+* 1 - position from eyes (weapon aiming).
+* 2 - end position from player position.
+* 3 - end position from eyes (hit point for weapon). 
+* 4 - position of last bullet hit (only CS). */
 native get_user_origin(index, origin[3], mode = 0);
 
 /* Returns all carried weapons as bit sum. Gets
- * also theirs indexes. */
+* also theirs indexes. */
 native get_user_weapons(index,weapons[32],&num);
 
 /* Returns weapon name. */
@@ -268,19 +274,19 @@ native log_message(const message[],{Float,_}:...);
 native log_to_file(const file[],const message[],{Float,_}:...);
 
 /* Returns number of players put in server. 
- * If flag is set then also connecting are counted. */
+* If flag is set then also connecting are counted. */
 native get_playersnum(flag=0);
 
 /* Sets indexes of players.
- * Flags:
- * "a" - don't collect dead players.
- * "b" - don't collect alive players.
- * "c" - skip bots.
- * "d" - skip real players.
- * "e" - match with team.
- * "f" - match with part of name.
- * "g" - ignore case sensitivity.
- * Example: Get all alive CTs: get_players(players,num,"ae","CT") */
+* Flags:
+* "a" - don't collect dead players.
+* "b" - don't collect alive players.
+* "c" - skip bots.
+* "d" - skip real players.
+* "e" - match with team.
+* "f" - match with part of name.
+* "g" - ignore case sensitivity.
+* Example: Get all alive CTs: get_players(players,num,"ae","CT") */
 native get_players(players[32], &num ,const flags[]="", const team[]="");
 
 /* Gets argument from command. */
@@ -293,27 +299,27 @@ native read_args(output[],len);
 native read_argc();
 
 /* Converts string to sum of bits.
- * Example: "abcd" is a sum of 1, 2, 4 and 8. */
+* Example: "abcd" is a sum of 1, 2, 4 and 8. */
 native read_flags(const flags[]);
 
 /* Converts sum of bits to string.
- * Example: 3 will return "ab". */
+* Example: 3 will return "ab". */
 native get_flags(flags,output[],len);
 
 /* Find player.
- * Flags:
- * "a" - with given name.
- * "b" - with given part of name.
- * "c" - with given authid.
- * "d" - with given ip.
- * "e" - with given team name.
- * "f" - don't look in dead players.
- * "g" - don't look in alive players.
- * "h" - skip bots.
- * "i" - skip real players.
- * "j" - return index of last found player. 
- * "k" - with given userid.
- * "l" - ignore case sensitivity. */
+* Flags:
+* "a" - with given name.
+* "b" - with given part of name.
+* "c" - with given authid.
+* "d" - with given ip.
+* "e" - with given team name.
+* "f" - don't look in dead players.
+* "g" - don't look in alive players.
+* "h" - skip bots.
+* "i" - skip real players.
+* "j" - return index of last found player. 
+* "k" - with given userid.
+* "l" - ignore case sensitivity. */
 native find_player(const flags[], ... );
 
 /* Removes quotes from sentence. */
@@ -323,9 +329,9 @@ native remove_quotes(text[]);
 native client_cmd(index,const command[],{Float,_}:...);
 
 /* This is an emulation of a client command (commands aren't send to client!).
- * It allows to execute some commands on players and bots.
- * Function is excellent for forcing to do an action related to a game (not settings!).
- * The command must stand alone but in arguments you can use spaces. */
+* It allows to execute some commands on players and bots.
+* Function is excellent for forcing to do an action related to a game (not settings!).
+* The command must stand alone but in arguments you can use spaces. */
 native engclient_cmd(index,const command[],arg1[]="",arg2[]="");
 
 /* Executes command on a server console. */
@@ -338,11 +344,11 @@ native set_cvar_string(const cvar[],const value[]);
 native cvar_exists(const cvar[]);
 
 /* Removes a cvar flags (not allowed for amx_version,
- * fun_version and sv_cheats cvars). */
+* fun_version and sv_cheats cvars). */
 native remove_cvar_flags(const cvar[],flags = -1);
 
 /* Sets a cvar flags (not allowed for amx_version,
- * fun_version and sv_cheats cvars). */
+* fun_version and sv_cheats cvars). */
 native set_cvar_flags(const cvar[],flags);
 
 /* Returns a cvar flags. */
@@ -382,39 +388,39 @@ native get_modname(name[],len);
 native get_time(const format[],output[],len);
 
 /* Returns time in given format. The most popular is: "%m/%d/%Y - %H:%M:%S".
- * Last parameter sets time to format. */
+* Last parameter sets time to format. */
 native format_time(output[],len, const format[],time = -1);
 
 /* Returns system time in seconds elapsed since 00:00:00 on January 1, 1970. 
- * Offset is given in seconds.*/
+* Offset is given in seconds.*/
 native get_systime(offset = 0);
 
 /* Returns time in input and additionaly fills missing information
- * with current time and date. If time is different than -1 then parsed
- * time is added to given time.
- * Example:
- * parset_time( "10:32:54 04/02/2003", "%H:%M:%S %m:%d:%Y" )
- * For more information see strptime(...) function from C libraries. */
+* with current time and date. If time is different than -1 then parsed
+* time is added to given time.
+* Example:
+* parset_time( "10:32:54 04/02/2003", "%H:%M:%S %m:%d:%Y" )
+* For more information see strptime(...) function from C libraries. */
 native parse_time(const input[],const format[], time = -1);
 
 /* Calls function on specified time.
- * Flags:
- * "a" - repeat.
- * "b" - loop task.
- * "c" - do task on time after a map timeleft.
- * "d" - do task on time before a map timelimit. */
+* Flags:
+* "a" - repeat.
+* "b" - loop task.
+* "c" - do task on time after a map timeleft.
+* "d" - do task on time before a map timelimit. */
 native set_task(Float:time,const function[],id = 0,parameter[]="",len = 0,flags[]="", repeat = 0);
 
 /* Removes all tasks with given id. If outside var is 
- * set then a task can be removed also when
- * was set in another plugin. */
+* set then a task can be removed also when
+* was set in another plugin. */
 native remove_task(id = 0, outside = 0);
 
 /* Returns 1 if task under given id exists. */
 native task_exists(id = 0, outside = 0);
 
 /* Sets flags for player. Set flags to -1 if you want to clear all flags.
- * You can use different settings by changing the id, which is from range 0 - 31. */
+* You can use different settings by changing the id, which is from range 0 - 31. */
 native set_user_flags(index,flags=-1,id=0);
 
 /* Gets flags from player. Set index to 0 if you want to read flags from server. */
@@ -445,27 +451,27 @@ native get_srvcmd(index,server_cmd[],len1,&flags, info[],len2, flag);
 native get_srvcmdsnum(flag);
 
 /* Gets info about console command. If id is set to 0,
- * then function returns only server cmds, if positive then
- * returns only client cmds. in other case returns all console commands. */
+* then function returns only server cmds, if positive then
+* returns only client cmds. in other case returns all console commands. */
 native get_concmd(index,cmd[],len1,&flags, info[],len2, flag, id = -1);
 
 /* Returns number of registered console commands. */
 native get_concmdsnum(flag,id = -1);
 
 /* Gets unique id of menu. Outside set to 1 allows
- * to catch menus outside a plugin where register_menuid is called. */
+* to catch menus outside a plugin where register_menuid is called. */
 native register_menuid(const menu[], outside=0 );
 
 /* Calls function when player uses specified menu and proper keys. */
 native register_menucmd(menuid,keys, const function[] );
 
 /* Gets what menu the player is watching and what keys for menu he have.
- * When there is no menu the index is 0. If the id is negative then the menu
- * is VGUI in other case the id is from register_menuid() function. */
+* When there is no menu the index is 0. If the id is negative then the menu
+* is VGUI in other case the id is from register_menuid() function. */
 native get_user_menu(index,&id,&keys);
 
 /* Forces server to execute sent server command at current time.
- * Very useful for map changes, setting cvars and other activities. */
+* Very useful for map changes, setting cvars and other activities. */
 native server_exec();
 
 /* Emits sound. Sample must be precached. */
@@ -484,34 +490,34 @@ native Float:random_float(Float:a,Float:b);
 native random_num(a,b);
 
 /* Pauses function or plugin so it won't be executed.
- * In most cases param1 is name of function and
- * param2 name of plugin (all depends on flags).
- * Flags:
- * "a" - pause whole plugin.
- * "b" - pause function.
- * "c" - look outside the plugin (by given plugin name).
- * "d" - set "stopped" status when pausing whole plugin.
- * "e" - set "locked" status when pausing whole plugin.
- *       In this status plugin is unpauseable.
- * Example: pause("ac","myplugin.amx") 
- *          pause("bc","myfunc","myplugin.amx") */
+* In most cases param1 is name of function and
+* param2 name of plugin (all depends on flags).
+* Flags:
+* "a" - pause whole plugin.
+* "b" - pause function.
+* "c" - look outside the plugin (by given plugin name).
+* "d" - set "stopped" status when pausing whole plugin.
+* "e" - set "locked" status when pausing whole plugin.
+*       In this status plugin is unpauseable.
+* Example: pause("ac","myplugin.amx") 
+*          pause("bc","myfunc","myplugin.amx") */
 native pause(flag[], const param1[]="",const param2[]="");
 
 /* Unpauses function or plugin.
- * Flags:
- * "a" - unpause whole plugin.
- * "b" - unpause function.
- * "c" - look outside the plugin (by given plugin name). */
+* Flags:
+* "a" - unpause whole plugin.
+* "b" - unpause function.
+* "c" - look outside the plugin (by given plugin name). */
 native unpause(flag[], const param1[]="",const param2[]="");
 
 /* Returns id of client message.
- * Example: get_user_msgid("TextMsg"). */
+* Example: get_user_msgid("TextMsg"). */
 native get_user_msgid(const name[]);
 
 /* These functinos are used to generate client messages.
- * You may generate menu, smoke, shockwaves, thunderlights,
- * intermission and many many others messages.
- * See HL SDK for more examples. */
+* You may generate menu, smoke, shockwaves, thunderlights,
+* intermission and many many others messages.
+* See HL SDK for more examples. */
 native message_begin( dest, msg_type, origin[3]={0,0,0},player=0);
 native message_end();
 native write_byte( x );
@@ -524,32 +530,32 @@ native write_coord( x );
 native write_string( x[] );
 
 /* Called on inconsistent file. You can put any text
- * into reason to change an original message. */
+* into reason to change an original message. */
 forward inconsistent_file(id,const filename[], reason[64] );
 
 /* Forces the client and server to be running with the same
- * version of the specified file ( e.g., a player model ). */
+* version of the specified file ( e.g., a player model ). */
 native force_unmodified(force_type, mins[3] , maxs[3], const filename[]);
 
 /* Checks if public variable with given name exists in loaded plugins. */
 native xvar_exists( const name[] );
 
 /* Returns an unique id for public variable specified by name. If such
- * variable doesn't exist then returned value is -1. */
+* variable doesn't exist then returned value is -1. */
 native get_xvar_id( const name[] );
 
 /* Returns an integer value of a public variable. Id is a value
- * returned by get_xvar_id(...) native. */
+* returned by get_xvar_id(...) native. */
 native get_xvar_num( id );
 
 /* Returns a float value of a public variable. Id is a value
- * returned by get_xvar_id(...) native. */
+* returned by get_xvar_id(...) native. */
 native Float:get_xvar_float( id );
 
 /* Sets a value of a public variable. Id is a value
- * returned by get_xvar_id(...) native. */
+* returned by get_xvar_id(...) native. */
 native set_xvar_num( id, value = 0 );
 
 /* Sets a float value of a public variable. Id is a value
- * returned by get_xvar_id(...) native. */
+* returned by get_xvar_id(...) native. */
 native set_xvar_float( id, Float:value = 0.0 );
\ No newline at end of file
diff --git a/plugins/include/core.inc b/plugins/include/core.inc
index ea6bd912..7acfc8dd 100755
--- a/plugins/include/core.inc
+++ b/plugins/include/core.inc
@@ -5,6 +5,11 @@
 * This file is provided as is (no warranties).
 */
 
+#if defined _core_included
+  #endinput
+#endif
+#define _core_included
+
 native heapspace();
 
 native funcidx(const name[]);
diff --git a/plugins/include/csstats.inc b/plugins/include/csstats.inc
index 328f5b77..3733788e 100755
--- a/plugins/include/csstats.inc
+++ b/plugins/include/csstats.inc
@@ -1,51 +1,56 @@
 /* CS Stats functions
 *
-* (c) 2002-2004, OLO
-*  modified by the AMX Mod X Development Team
+* by the AMX Mod X Development Team
+*  originally developed by OLO
 *
 * This file is provided as is (no warranties).
 */
 
+#if defined _csstats_included
+  #endinput
+#endif
+#define _csstats_included
+
 /* Gets stats from given weapon index. If wpnindex is 0
- * then the stats are from all weapons. If weapon has not been used function
- * returns 0 in other case 1. Fields in stats are:
- * 0 - kills
- * 1 - deaths
- * 2 - headshots
- * 3 - teamkilling
- * 4 - shots
- * 5 - hits
- * 6 - damage
- * For body hits fields see amxconst.inc. */
+* then the stats are from all weapons. If weapon has not been used function
+* returns 0 in other case 1. Fields in stats are:
+* 0 - kills
+* 1 - deaths
+* 2 - headshots
+* 3 - teamkilling
+* 4 - shots
+* 5 - hits
+* 6 - damage
+* For body hits fields see amxconst.inc. */
 native get_user_wstats(index,wpnindex,stats[8],bodyhits[8]);
 
 /* Gets round stats from given weapon index.*/
 native get_user_wrstats(index,wpnindex,stats[8],bodyhits[8]);
 
 /* Gets overall stats which are stored in file on server
- * and updated on every respawn or user disconnect.
- * Function returns the position in stats by diff. kills to deaths. */
+* and updated on every respawn or user disconnect.
+* Function returns the position in stats by diff. kills to deaths. */
 native get_user_stats(index,stats[8],bodyhits[8]);
 
 /* Gets round stats of player. */
 native get_user_rstats(index,stats[8],bodyhits[8]);
 
 /* Gets stats with which user have killed/hurt his victim. If victim is 0
- * then stats are from all victims. If victim has not been hurt, function
- * returns 0 in other case 1. User stats are reset on his respawn. */
+* then stats are from all victims. If victim has not been hurt, function
+* returns 0 in other case 1. User stats are reset on his respawn. */
 native get_user_vstats(index,victim,stats[8],bodyhits[8],wpnname[]="",len=0);
 
 /* Gets stats with which user have been killed/hurt. If killer is 0
- * then stats are from all attacks. If killer has not hurt user, function
- * returns 0 in other case 1. User stats are reset on his respawn. */
+* then stats are from all attacks. If killer has not hurt user, function
+* returns 0 in other case 1. User stats are reset on his respawn. */
 native get_user_astats(index,wpnindex,stats[8],bodyhits[8],wpnname[]="",len=0);
 
 /* Resets life, weapon, victims and attackers user stats. */
 native reset_user_wstats(index);
 
 /* Gets overall stats which stored in stats.dat file in amx folder
- * and updated on every mapchange or user disconnect.
- * Function returns next index of stats entry or 0 if no more exists. */
+* and updated on every mapchange or user disconnect.
+* Function returns next index of stats entry or 0 if no more exists. */
 native get_stats(index,stats[8],bodyhits[8],name[],len);
 
 /* Returns number of all entries in stats. */
diff --git a/plugins/include/engine.inc b/plugins/include/engine.inc
index ad8f654a..d1262e12 100755
--- a/plugins/include/engine.inc
+++ b/plugins/include/engine.inc
@@ -1,11 +1,16 @@
-/* Engine
+/* Engine functions
 *
-* (c) 2004, the AMX Mod X Development Team
+* by the AMX Mod X Development Team
 *  thanks to Vexd
 *
 * This file is provided as is (no warranties).
 */
 
+#if defined _engine_included
+  #endinput
+#endif
+#define _engine_included
+
 #include <engine_const>
 #include <engine_stocks>
 
diff --git a/plugins/include/engine_const.inc b/plugins/include/engine_const.inc
index 9e832eb2..3d82d003 100755
--- a/plugins/include/engine_const.inc
+++ b/plugins/include/engine_const.inc
@@ -1,10 +1,15 @@
-/* Engine Constants
+/* Engine constants
 *
-* (c) 2004, by the AMX Mod X Development Team
+* by the AMX Mod X Development Team
 *
 * This file is provided as is (no warranties).
 */
 
+#if defined _engine_const_included
+  #endinput
+#endif
+#define _engine_const_included
+
 #define SPEAK_NORMAL		0
 #define SPEAK_MUTED		1
 #define SPEAK_ALL		2
@@ -48,7 +53,7 @@ enum {
 	EV_INT_iStepLeft,
 	EV_INT_movetype,
 	EV_INT_solid,
-	EV_INT_skin,			
+	EV_INT_skin,
 	EV_INT_body,
 	EV_INT_effects,
 	EV_INT_light_level,
diff --git a/plugins/include/engine_stocks.inc b/plugins/include/engine_stocks.inc
index 0032d6aa..2769bad4 100755
--- a/plugins/include/engine_stocks.inc
+++ b/plugins/include/engine_stocks.inc
@@ -1,11 +1,16 @@
-/* Engine Stocks
+/* Engine stocks
 *
-* (c) 2004, AssKicR, Freecode & T(+)rget
-*  modified by the AMX Mod X Development Team
+* by the AMX Mod X Development Team
+*  thanks to AssKicR, Freecode and T(+)rget
 *
 * This file is provided as is (no warranties).
 */
 
+#if defined _engine_stocks_included
+  #endinput
+#endif
+#define _engine_stocks_included
+
 /* Changes an integer vec to a floating vec */
 stock IVecFVec(IVec[3], Float:FVec[3])
 {
diff --git a/plugins/include/file.inc b/plugins/include/file.inc
index 7d2fab48..da0c6eb6 100755
--- a/plugins/include/file.inc
+++ b/plugins/include/file.inc
@@ -1,20 +1,25 @@
 /* Files functions
 *
-* (c) 2002-2004, OLO
-*  modified by the AMX Mod X Development Team
+* by the AMX Mod X Development Team
+*  originally developed by OLO
 *
 * This file is provided as is (no warranties).
 */
 
+#if defined _file_included
+  #endinput
+#endif
+#define _file_included
+
 /* Reads content from directory.
- * Returns index of next element or 0 when end of dir. is reached. */
+* Returns index of next element or 0 when end of dir. is reached. */
 native read_dir(const dirname[],pos,output[],len,&outlen);
 
 /* Reads line from file. Returns index of next line or 0 when end of file is reached. */
 native read_file(const file[],line,text[],len,&txtlen);
 
 /* Writes text to file. Function returns 0 on failure.
- * When line is set to -1, the text is added at the end of file. */
+* When line is set to -1, the text is added at the end of file. */
 native write_file(const file[],const text[],line = -1);
 
 /* Deletes file. Function returns 1 on success, 0 on failure. */
@@ -24,7 +29,7 @@ native delete_file(const file[]);
 native file_exists(const file[]);
 
 /* Returns a file size in bytes if flag is set to 0.
- * When flag is set to 1 returns number of lines in the file,
- * and when flags is 2, function returns 1 if the file ends
- * with line feed. If file doesn't exist returns -1. */
+* When flag is set to 1 returns number of lines in the file,
+* and when flags is 2, function returns 1 if the file ends
+* with line feed. If file doesn't exist returns -1. */
 native file_size(const file[], flag=0);
\ No newline at end of file
diff --git a/plugins/include/float.inc b/plugins/include/float.inc
index ff70fde1..aac13a1f 100755
--- a/plugins/include/float.inc
+++ b/plugins/include/float.inc
@@ -47,8 +47,8 @@ native Float:floatfract(Float:value);
 native floatround(Float:value, floatround_method:method=floatround_round);
 
 /* Compare two integers. If the two elements are equal, return 0.
- * If the first argument is greater than the second argument, return 1,
- * If the first argument is less than the second argument, return -1. */
+* If the first argument is greater than the second argument, return 1,
+* If the first argument is less than the second argument, return -1. */
 native floatcmp(Float:fOne, Float:fTwo);
 
 /* Return the square root of the input value, same as floatpower(value, 0.5) */
@@ -61,7 +61,7 @@ native Float:floatpower(Float:value, Float:exponent);
 native Float:floatlog(Float:value, Float:base=10.0);
 
 /* Return the sine, cosine or tangent.
- * The input angle may be in radian, degrees or grades. */
+* The input angle may be in radian, degrees or grades. */
 native Float:floatsin(Float:value, anglemode:mode=radian);
 native Float:floatcos(Float:value, anglemode:mode=radian);
 native Float:floattan(Float:value, anglemode:mode=radian);
diff --git a/plugins/include/fun.inc b/plugins/include/fun.inc
index a6046497..bad06317 100755
--- a/plugins/include/fun.inc
+++ b/plugins/include/fun.inc
@@ -1,9 +1,14 @@
 /* Fun functions
- *
- * (c) 2004, the AMX Mod X Development Team
- *
- * This file is provided as is (no warranties).
- */
+*
+* by the AMX Mod X Development Team
+*
+* This file is provided as is (no warranties).
+*/
+
+#if defined _fun_included
+  #endinput
+#endif
+#define _fun_included
 
 /* (untested) Returns 1 if receiver hears sender via voice communication. */
 native get_client_listen(receiver, sender);
@@ -33,21 +38,21 @@ native set_user_origin(index, origin[3]);
 native set_user_rendering(index, fx = kRenderFxNone, r = 255, g = 255, b = 255, render = kRenderNormal, amount = 16);
 
 /* Gives item to player, name of item can start
- * with weapon_, ammo_ and item_. This event
- * is announced with proper message to all players. */
+* with weapon_, ammo_ and item_. This event
+* is announced with proper message to all players. */
 native give_item(index, const item[]);
 
 /* (not yet implemented, don't know how to use native)
- * Sets hit zones for player. This event is announced
- * with proper message to all players.
- * Parts of body are as bits:
- * 2   - head
- * 4   - chest
- * 8   - stomach
- * 16  - left arm
- * 32  - right arm
- * 64  - left leg
- * 128 - right leg */
+* Sets hit zones for player. This event is announced
+* with proper message to all players.
+* Parts of body are as bits:
+* 2   - head
+* 4   - chest
+* 8   - stomach
+* 16  - left arm
+* 32  - right arm
+* 64  - left leg
+* 128 - right leg */
 native set_hitzones(body = 255);
 
 /* backwards compatibility */
@@ -97,4 +102,4 @@ native get_user_noclip(index);
 
 /* Gives player silent footsteps.
  * if set = 0 it will return footsteps to normal */
-native set_user_footsteps(id, set = 1);
+native set_user_footsteps(id, set = 1);
\ No newline at end of file
diff --git a/plugins/include/mysql.inc b/plugins/include/mysql.inc
index 6ffa8fae..08c0ace2 100755
--- a/plugins/include/mysql.inc
+++ b/plugins/include/mysql.inc
@@ -1,14 +1,19 @@
 /* MySQL functions
 *
-* (c) Copyright 2002-2004, dJeyL
-*  modified by the AMX Mod X Development Team
+* by the AMX Mod X Development Team
+*  originally developed by OLO
 *
 * This file is provided as is (no warranties).
 */
 
+#if defined _mysql_included
+  #endinput
+#endif
+#define _mysql_included
+
 /* Opens connection. If already such exists then that will be used.
- * Function returns sql id to use with other sql natives.
- * Host can be plain ip or with port seperated with ':' char. */
+* Function returns sql id to use with other sql natives.
+* Host can be plain ip or with port seperated with ':' char. */
 native mysql_connect(host[],user[],pass[],dbname[],error[],maxlength);
 
 /* Uses an existing connection (sql) to perform a new query (query) (might close previous query if any). */
diff --git a/plugins/include/string.inc b/plugins/include/string.inc
index 35814395..24dd80bb 100755
--- a/plugins/include/string.inc
+++ b/plugins/include/string.inc
@@ -1,29 +1,34 @@
 /* Strings manipulation
 *
-* (c) 2002-2004, OLO
-*  modified by the AMX Mod X Development Team
+* by the AMX Mod X Development Team
+*  originally developed by OLO
 *
 * This file is provided as is (no warranties).
 */
 
+#if defined _string_included
+  #endinput
+#endif
+#define _string_included
+
 /* Checks if source contains string. On success function
- * returns position in source, on failure returns -1. */
+* returns position in source, on failure returns -1. */
 native contain(const source[],const string[]);
 
 /* Checks if source contains string with case ignoring. On success function
- * returns position in source, on failure returns -1. */
+* returns position in source, on failure returns -1. */
 native containi(const source[],const string[]);
 
 /* Replaces given string to another in given text. */
 native replace(text[],len,const what[],const with[]);
 
 /* Adds one string to another. Last parameter different from 0, specifies
- * how many chars we want to add. Function returns number of all merged chars. */
+* how many chars we want to add. Function returns number of all merged chars. */
 native add(dest[],len,const src[],max=0);
 
 /* Fills string with given format and parameters.
- * Function returns number of copied chars.
- * Example: format(dest,"Hello %s. You are %d years old","Tom",17). */
+* Function returns number of copied chars.
+* Example: format(dest,"Hello %s. You are %d years old","Tom",17). */
 native format(output[] ,len ,const format[] , {Float,_}:...);
 
 /* Gets parameters from function as formated string. */
@@ -38,29 +43,29 @@ native str_to_num(const string[]);
 native strtonum(const string[]);
 
 /* Checks if two strings equal. If len var is set
- * then there are only c chars comapred. */
+* then there are only c chars comapred. */
 native equal(const a[],const b[],c=0);
 
 /* Checks if two strings equal with case ignoring. 
- * If len var is set then there are only c chars comapred. */
+* If len var is set then there are only c chars comapred. */
 native equali(const a[],const b[],c=0);
 
 /* Copies one string to another. By len var
- *  you may specify max. number of chars to copy. */
+*  you may specify max. number of chars to copy. */
 native copy(dest[],len,const src[]);
 
 /* Copies one string to another until char ch is found. 
- *  By len var you may specify max. number of chars to copy. */
+*  By len var you may specify max. number of chars to copy. */
 native copyc(dest[],len,const src[],ch);
 
 /* Sets string with given character. */
 native setc(src[],len,ch);
 
 /* Gets parameters from text.
- * Example: to split text: "^"This is^" the best year",
- * call function like this: parse(text,arg1,len1,arg2,len2,arg3,len3,arg4,len4)
- * and you will get: "This is", "the", "best", "year"
- * Function returns number of parsed parameters. */
+* Example: to split text: "^"This is^" the best year",
+* call function like this: parse(text,arg1,len1,arg2,len2,arg3,len3,arg4,len4)
+* and you will get: "This is", "the", "best", "year"
+* Function returns number of parsed parameters. */
 native parse(const text[], ... );
 
 /* Converts all chars in string to lower case. */
diff --git a/plugins/include/vault.inc b/plugins/include/vault.inc
index ecf173cf..b95d8039 100755
--- a/plugins/include/vault.inc
+++ b/plugins/include/vault.inc
@@ -1,14 +1,19 @@
-/* Vault
+/* Vault functions
 *
-* (c) 2002-2004, OLO
-*  modified by the AMX Mod X Development Team
+* by the AMX Mod X Development Team
+*  originally developed by OLO
 *
 * This file is provided as is (no warranties).
 */
 
+#if defined _vault_included
+  #endinput
+#endif
+#define _vault_included
+
 /* Reads a data from given key.
- * If len is set to zero then get_vaultdata
- * returns value as an number. */
+* If len is set to zero then get_vaultdata
+* returns value as an number. */
 native get_vaultdata(const key[], data[] = "", len = 0);
 
 /* Sets a data under given key. */