i dunno if other people have had this happen to them, but i bought the GTA collection classic and installed GTA1.  it installed fine but whenever i try to play it, it won't recognize the CD and thinks it's a backup copy.  It's strange because whenever i put the CD in my drive i get the play menu but whenever i click 'play' it doesn't see the CD as the original CD.  i haven't tried installing GTAlondon or GTA2 yet, so i don't know if it does the same thing, but i really want to play the original first.  anyone have this problem before? 
thanks