When upgrading my G5 I simply backed up the old drive to the neww 500 gig drive in bay 2 and then switched them. Could I just switch it to a Quad and the voila! it works? Could it be that simple or will I need to reinstall all the software? What about installing the drive into a Macpro? Could I just place it in a bay and then run all my programs, like Photoshop, Imageprint, and Office?