Changing Drive Letters in Windows XP?
When you add drives to your computer, such as an extra hard drive, a CD drive, or a storage device that corresponds to a drive, Windows automatically assigns letters to the drives. However, this assignment might not suit your system; for example, you might have mapped a network drive to the same letter that Windows assigns to a new drive. When you want to change drive letters, follow these steps:
You will not be able to change the boot or system drive letter in this manner. Many MS-DOS-based and Windows-based programs make references to a specific drive letter (for example, environment variables). If you modify the drive letter, these programs may not function correctly.
HOW TO: Change
the System/Boot Drive Letter in Windows (Q223188)
This article is for Windows 2000, but the same concepts apply to Windows XP. I do not offer ANY support for this procedure. NOTE: Some user's have reported that this has rendered their system unbootable. Others have reported that it works. If you follow this procedure, you do so at your own risk.