Just a quickie. Ive recently converted to 64 bit and noticed a minute ago none of the trainers seem to work. Any managed to get them running in x64 or have any workarounds to do so?
The Cheat Happens trainers I have run flawlessly on Vista x64. Try re-downloading and putting the trainers in the game executable directory.
Do you have the gta IV latest trainer running in x64?