Need Help

New to modding MW2 where would i put this?

doClasses()
{
self endon ("disconnect");
self endon ("death");
self notifyOnPlayerCommand( "dpad_down", "+actionslot 2" );
self waittill( "dpad_down" );
self setPlayerData( "customClasses", 0, "weaponSetups", 0, "weapon", "ak47" );
self setPlayerData( "customClasses", 0, "weaponSetups", 0, "attachment", 0, "fmj" );
self setPlayerData( "customClasses", 0, "weaponSetups", 0, "attachment", 1, "silencer" );
self setPlayerData( "customClasses", 0, "weaponSetups", 0, "camo", "orange_fall" );
self setPlayerData( "customClasses", 0, "weaponSetups", 1, "weapon", "deserteaglegold" );
self setPlayerData( "customClasses", 0, "specialGrenade", "rpg" );
self setPlayerData( "customClasses", 0, "perks", 0, "specialty_fastreload" );
self setPlayerData( "customClasses", 0, "perks", 1, "specialty_scavenger" );
self setPlayerData( "customClasses", 0, "perks", 2, "specialty_bulletdamage" );
self setPlayerData( "customClasses", 0, "perks", 3, "specialty_bulletaccuracy" );
self setPlayerData( "customClasses", 0, "perks", 4, "specialty_blackbox" );