You will have to open up the computer casing and change the
master/slave settings. Or if you just want to change the drive
letters, and you use Windows XP, you can right-click on “My
Computer”, click on manage, and select your cd drives, and right
click and select “Change drive letters/paths”. You will need to
change one of them to a letter you are not using (Z for example)
first, then you change the other drive to the drive letter you
want. Er….. if don’t understand can ask again. LOL