OK I have an old HDD which is my main one, my C. I just got a new Raptor and I want to make it C, and make the one I have now something else. So I'm going to instal Vista 64 bit on my new HDD. Can I boot with two "C" disks? How will it know which one to boot from? Once I get into windows I'm going to reformat the old one, just not sure how to go about it. :S
From my experience dual-booting Windows XP and 7, each OS sees their respective "home" drives as C, and the other as D. You can boot with two "C" disks, you'll just have to choose which OS to start whenever you boot up.