Grand Theft Auto 4 (GTA 4) Discussion
It could work but you would need to find out how to get the game to recognise the files. If I were attempting this I would install GTA to the hardrive, use a data cable from your XboxHDD to your computer and try to figure it out from there. Personally, doing something like custom/hack a xbox game is something too much out of my capablilities.
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem