Question 1: I would like to use my 10gb Seagate original HDD in a spare PC. Do I need to go about all that crap in the tutorial or can I just unlock it with Config Magic, then format it in DOS and thats it?

Question 2: Is there a way to use it in the XBOX again if I for some reason choose to do that, can I "xbox-format it", lock it and transfer all of my backed up files again and make the drive "as good as the old one"? Maybe MS one day decides to check the harddrive for not-original files, and the only way to play live would be to boot up an completely original drive!