Drive Letter renaming

Hi, quick question... I used partition magic to split my C Drive in half, worked fine, but named the second partition as Drive E (DVD Rom remained as drive D)
I know that its all working fine, but how can i swap the drive letters for drives D and E around, as I am used to having my CD device as Drive E :confused:

What OS are you running? ? ?

for 2k and XP, right click my computer, select mange.
Go into Disk management, right click on the drive you want to change.
Select Change drive letter and path

Thanks, that sorted it!