Windows 7 64 bit programs you can usually go into the .exe's properties and switch the compatibility mode and also change it to run in administrator mode.
That usually works for most programs that have trouble in 64 bit.
I'd think it's more of a version of the trainer your trying to use though over the 64 bit thing.
Most trainers only work with certain versions of the game. Every time there is a patch or any kind of update you need a new trainer for it most of the time.
Make sure your getting a trainer for your specific version of the game.
I have a link to around 20 different trainers for different versions of the game but not posting it here as it has some adult type advertising on it's page.
Last edited by Diff_1; 11/02/10 09:56 AM. Reason: spelling & punctuation.