Awhile back I made ISO images of all my games and they are still on my PC. I did this because I was bored mostly but I did it too so that it would save me time when I finally got my PS2 modded. It was a good thing too because my girlfriends mangy dog got ahold of my games and destroyed nearly all of them. My question is how do I tell if the image was of a CD or a DVD? I know that if its over 650 or 700 megs its gotta be a DVD but what about the others? Is there a way to tell if it was a CD???? should I just assume that all the ISO's over 700 megs are DVDs? Thanks in advance.