I'm uisng XP so it maybe different in 2000 but go to Start > Run > Copy and Paste:
Now right click on your CD drives and click "Change Drive letters and paths..."
Click change and choose X as the drive letter.
Do the same for your hard drive but select the drive letters you want. Then go back to the CD drives and put them back to what you want.
You will get a warning about changing the letters so take not of that.