Hello guys! I am somewhat new to using apple computers, ive never really needed to learn how to use them. I had gotten 2 macs the other day, which are both Power PC. The one I am interested in fixing the most is a Power Mac G4 with the duel drive doors. Right now I have it bridged over the network and have the software updated to 10.4.11. I am trying to upgrade it to 10.5, which would be Leopard. I have a DMG image of Leopard 1.5, which I have burned to a DVD DL, and tried to install, but the mac is not able to read those kind of discs. I have also tried a usb flash drive, with the recovery thing. I did read somewhere of a thing called startup disc, but my drive was not listed in it. Would anyone here have any other suggestions??