not saying that i do it i just know how if u wanna learn tell me for what game and i will tell you the steps
i have modded halo reach im max level with max credits
Call of Duty World at War Nazi Zombies and Infection multiplayer mods
Call of Duty Black Ops Zombies and campain
MW2 (the zombies mod with lots of knives)
lemme know if u wanna learn its easy