I have just downloaded a game that I cannot get in any shops at all, I burnt it onto a disk and installed it, when i went to play it it told me wrong disk I have a no cd ...
People who've bought their game sometimes make a backup copy in case the CD breaks. These people sometimes scour the world wide web to find a .com site to help them find working cracks.
Check if theres a readme file and maybe theres some instructions there. Or maybe you need a no cd crack, check your cd, maybe it is included there somewhere.