actually, i've just been using the trainer for a few minutes, and it seems that whenever the inf ammo part of the trainer is active, the game (and the trainer itself, you can see the icon's lighting up hell lagged and slow) runs like a bad multiplayer lag. so the trainer's pretty much useless for singleplayer, only has god mode. (big sigh) so i guess im still looking. and it's not my computer. the less options (theres like primary inf, secondary, grenades, flashes etc.) you choose, the less it lags, but its still not playable.
thanks anyway, but i won't be using it.