Today I wanted to copy a HD in a G5 with a 'fresh' (ie: never started) Leopard install to a second hard drive. Digging under my desk I found a USB HD with a (Super Duper) backup of my old PowerBook. So I connected the USB drive to the G5, booted from the PowerBook backup and was able to duplicate the hard drive! It was odd to see my PowerBook config running on a G5. But I must say Kudos to Apple for not hard coding the drive that can be used to boot it's OS.