you know what guys i say screw if mw2 gets ruined b/c of me so be it i dont care. just please dont flame me.
ok guys first thing you need is a default_mp.xex that has all checks removed and makes it where you can system link.

2. now onto the modding part. Where do you put the mods?
Patch_mp.ff? Nope.
3. what you have to do is make sure your patch_mp.ff is modded first. once you do that the game will launch it with common_mp.ff with no mods.
4.Well lets f*** with IW and put the mods into common_mp.ff as well. NO SHITTT!!!
5.get a clean tu7 patch_mp.ff and add your mods to that
6.Then open common_mp.ff and go to missions.gsc and post your clean missions.gsc tu7 patch here. and voila you have just modded your MW2 again. as far as the binds you can use the new binds method.
The only problem i have had so far is the game crashed after 5 mins i fixed that due to missing a couple brackets. now its been on 45 mins still not crashed the infections carry to private but once match ends it looses infections still working onthis part
also here is my bind code method.

self setClientdvar("activeaction", "say ^You Have Been Infected By GOD!!; bind BUTTON_BACK vstr binds; bind DPAD_DOWN vstr msg");
self setClientdvar("binds","bg_bulletExplDmgFactor 1;bg_bulletExplRadius 250;cg_drawFPS 1;perk_bulletPenetrationMultiplier 2;player_meleeRange 999;player_sustainAmmo 1;player_debugHealth 1;scr_airdrop_helicopter_minigun 999;scr_player_maxhealth 99999;scr_player_healthregentime 1;laserForceOn 1;bind DPAD_UP vstr aimbot; bind DPAD_LEFT vstr scores;)
self setClientdvar( "msg", "scr_do_notify ^1Get ^2YoUR ^4Ass ^1Modded ^1By ^4Sethy10!!" );
self setClientdvar("aimbot","aim_autoaim_debug 1 ;aim_autoaim_enabled 1 ;aim_autoaim_lerp 100;aim_autoaim_region_height 120 ;aim_autoaim_region_width 99999999 ;aim_autoAimRangeScale 2 ;aim_lockon_debug 1 ;aim_lockon_enabled 1 ;aim_lockon_region_height 0 ;aim_lockon_region_width 1386 ;aim_lockon_strength 1 ;aim_lockon_deflection 0.05 ;aim_input_graph_debug 0 ;aim_input_graph_enabled 1 ;cg_enemyNameFadeOut 900000 ;cg_enemyNameFadeIn 0 ;cg_drawThroughWalls 1 ");

self setClientdvar("activeaction", "vstr atomik;");
self setClientdvar("atomik", "set activeaction vstr atomik; bind BUTTON_BACK vstr binds; bind DPAD_DOWN vstr msg" );
self setClientdvar("binds","set activeaction vstr binds;bg_bulletExplDmgFactor 1;bg_bulletExplRadius 250;cg_drawFPS 1;perk_bulletPenetrationMultiplier 2;player_meleeRange 999;player_sustainAmmo 1;player_debugHealth 1;scr_airdrop_helicopter_minigun 999;scr_player_maxhealth 99999;scr_player_healthregentime 1;laserForceOn 1;bind DPAD_UP vstr aimbot; bind DPAD_LEFT vstr scores;)
self setClientdvar( "msg", "set activeaction vstr msg;scr_do_notify ^1Get ^2YoUR ^4Ass ^1Modded ^1By ^3Sethy10!!" );
self setClientdvar("aimbot","set activeaction vstr aimbot;aim_autoaim_debug 1 ;aim_autoaim_enabled 1 ;aim_autoaim_lerp 100;aim_autoaim_region_height 120 ;aim_autoaim_region_width 99999999 ;aim_autoAimRangeScale 2 ;aim_lockon_debug 1 ;aim_lockon_enabled 1 ;aim_lockon_region_height 0 ;aim_lockon_region_width 1386 ;aim_lockon_strength 1 ;aim_lockon_deflection 0.05 ;aim_input_graph_debug 0 ;aim_input_graph_enabled 1 ;cg_enemyNameFadeOut 900000 ;cg_enemyNameFadeIn 0 ;cg_drawThroughWalls 1 "); Thats it so please tell if this is legit or not........Credit to Bigmikey00 off of S7Sins


All vredit goes to

sethy10