ive managed to fix this prob, but im still under fire.
The discs im using are burnt discs i made from the images of my originals, which are really scratched and unplayable.
I keep on getting errors like 'no shader files' and 'ui/menu.txt missing', and no matter what i just cant get to the main menu after executing sp or mp
im guessing my cd images were corrupted or i didnt get all the files or something.