It was only able to read FIFA08... after running it for a few minutes I tryed again with COD4, and it couldn't read it... after that, it didn't run FIFA08 anymore... Then I thought I should've left it like that and just throw COD4 away, but then again...
The game is brand new, I just bought it yesterday and I see no scratches or anything of that sort for it to be read as a corrupt file.