I heard there is a way to mod the game dvd of gta sa. I have the moded files but when I try to make an iso of the game dvd (using dvd decrypter) and then modifying it and then burning it back onto a dvd using dvd decrypter the game doesn't work. Even at the beginning the "Playstation 2" thing doesn't come. And yes, I have a modchip (dms3).
I don't think you are allowed to change the files of the game (either by copyright law or the EULA). If I am mistaken, feel free to contact me, until that moment, this topic will be closed.