i was wondering if the install cds follow the computer or the hdd (kind of like does car insurance follow the car or the person)? by this i mean how does the computer recognize what install cd is placed in it? am i able to use another mbp's install cd on a fresh empty hdd in another mbp? i have 2 mbps. upgrading the hdd on mbp#2 but dont have the original disks to that. only have the original disks to mbp#1. i feel like doing a test with mbp#2's current hdd. but dont know how to wipe the drive w/o the discs. i suppose i can take it out, attach it via usb/sata adapter to my mbp#1 and use disk utility to wipe?