The current model PowerBooks ship with this drive as the SuperDrive option. The iMac G5 also ships with this same drive. Strangely, while the drive as installed in the iMac G5 can burn DVD+R DL discs, the drive in the PowerBook is limited to single-layer only. This is obviously a limitation of the firmware, probably set up by Apple. Anyone know of a way to either enable DL burning on the PowerBook, or has a link to a firmware update (maybe a reflash utility for the iMac G5)?