Hi everyone, I have one of the first 17-inch Al PowerBook G4's running at 1 GHz (PowerPC G4). I was thinking about upgrading it to Leopard but I can't seem to get my Apple OS X Version 10.5 Install DVD to work on this older machine's SuperDrive. The DVD-R has just over 7 GB of data on it, so maybe it's a dual layer DVD-R that may not be compatible with the older MATSHITADVD-R UJ-815 (Panasonic?) internal SuperDrive. Is there a special DVD-ROM of Leopard I could order from Apple that will work on my older 17-inch PowerBook G4, or is this Leopard 10.5 install a BAD idea for this (going on five years old) portable Apple computer? Thanks for reading my first post on MacRumors: Forums!