Well, I'm using PerX and http://www.mpgh.net/forum/164-combat...-god-mode.html. Once I run PerX and browse and take mattyspub.rar and run CombatArms through the CombatArms_Direct to inject, it injects but when i get to the screen i don't see any trainer after trying to inject several times.
Try various injectors. I can personally attest for N-Jector. However, a forewarning, it does require you to download msvcp100d.dll and msvcr100d.dll and place them in the same folder as it. It is a great injector and is worth trying.