I recieved a computer form a friend, and it's power port area was messed up, so I just scraped it. It was Windows 2000 I believe (possibly ME, not 100% sure)But well, it's drive letter is C:, and my XP drive letter is C:. I need to change the 2000 drive's letter to H (A & B are reserved for floppy drives, C is my main hard drive, D is it's partitioned drive for system restore stuff, E is my cd-rw, and F is my dvd-rom drive), and it needs formatted so it can act as extra memory for my XP. But, my XP disc didn't work in it, and since the other computer was scapped, I have to disconnect my C drive and connect the other, so it'll work. If they're both hooked up at the same time, then it doesn't read either because it reads that there is 2 C drives.
So basically, I need a way to change one of their letters (without loosing any of my file for my XP C drive) so they're compatible with eachother.