Generally speaking, any question about using the trainer in a multiplayer environment will get you far more abuse than a solid answer, even if it's just No.
The responses here are pretty tame compared to if you'd asked elsewhere.
And for the record, even using just the credits option is still gaining you an advantage over everyone else. It may not be competitive MP, but it's still just as bad.
In the future, I suggest you use the trainer for single player only, and if you ever wonder if an option will work in MP, no matter how small or simple it may seem to you, just assume "No".
Why would you make this topic in the first place when the site's FAQ page clearly states trainers will never work for multiplayer? I don't care what half-assed excuse you give me, I don't believe for a second your denial for having intentions of getting some kind of verification without doing it yourself (which requires someone else to do) so you could use it yourself.
Don't make topics about multiplayer hacks again. Not even discussions. Topic locked.
[Edited by moderator Neo7, 3/9/2012 7:25:18 AM]