It's a 17 inch 1GHz G4 iMac. I just wiped the hard drive with the DBAN CD so I could do a completely fresh install. I've run the hardware test and everything is working fine. My Leopard DVD is in good condition and not scratched. I have previously used my Leopard DVD on this computer to upgrade from 10.4 to 10.5. Problem: I can't boot from the Leopard DVD. It just spins around for a few moments and then get ejected. I've tried holding down C on boot, holding down option (it doesn't detect the DVD), and holding down nothing on boot up. Any help would be appreciated.