Modio
Cod tool 1.5
Save Game (if not your own, mine)
1) Open up Cod tool 1.5 and drag your savegame into it, go to advanced.
2) Type in the 'settings' area; activeaction and in the value section type bind button_back vstr main
3) Type in the 'settings' box: main and in value; vstr m1;vstr m2;vstr m3;vstr m4;vstr m5;vstr m6;vstr m7 and vstr m8 if you want an extra one.
4) Watch this video on what mods and the 10th stuff you need in.
5) After watching the video 'save changes'
6) Open modio, explore a device
7) Delete your file and insert your modded one.