Complete tutorial, self modding halo 2, what programs needed

[AvengedRocker]

hey i want to know if someone can help me start from scratch on how to mod halo 2 maps so i can get some of my ideas in to play, i want to know if some one can give me pratically a self explanation from some one on making self modifications if u can im me on aim messenger - linkinpark4868 is my screen name