Does anyone know what file extension or format OS 10.5 DVD comes with? In other words, when you buy the "retail" version of OS 10.1 or 2 or any future editions, does the DVD come as a DMG format or ISO? It would have to come with either format so the Mac can boot off of the DVD. Basically, what I am trying to do is make a bootable OS 10.5 DVD so I can install 10.5 on my Mac. Any suggestions?