My Computer displays by default the drive-letters like this (Where "System" is the partition label):

System (C:)
Compact Disc (Z:)

It is possible to change this the position of the drive letter, so it is in front:

(C:) System
(Z:) Compact Disc

This is done with this registry key:

[HKEY_LOCAL_MACHINE \Software \Microsoft \Windows \CurrentVersion \Explorer]
ShowDriveLettersFirst = 4 (0 = Default)

1 = Drive letter first for remote drives
2 = No drive letters (Same as "Show drive letters" in Vista Folder Options)
4 = Drive letter first for all drives

More Info MS KB330193

Credits Windowsxp.mvps.org