I restored a system image to a spare hard drive so I can maintain a static copy of XP for testing. Rather than tweaking the registry to match the drive letter, I would like to boot to the new partition as C: by selecting it as the boot drive in BIOS, rather than using a boot manager. I hope I'm making sense. Anyway, I have not been able to boot from the new partition. I'm guessing the reason is because it's assigned drive letter H: I obviously cannot assign C: to the new partition while booted from my primary HDD. Is it possible to boot into DOS (using startup floppy) and permanently change the drive letter to C:? If so, what is the command for this?