How to install Windows Server 2008 r2 to D:

This is the only way I've found so far that actually works to put Windows 2008 server on D:

• Install Windows 2008 on C: (you will trash this later, get used to wasting time)
• After successful installation, use the storage manager to change the name of the CD-ROM drive to R: and reboot (rebooting is important, don't skip it)
• Use the Registry editor in Administrator mode to rename key  HKLM\SYSTEM\MountedDevices\DosDevices\C: to D:
• Reboot, and windows will act stupid
• Start task manager to run Explorer as administrator
• Run Windows Setup from your CD, and install again (this time to D:), and do NOT upgrade
• Eventually you'll have a system installed on D:, and a Windows.old directory to nuke.

It took me about 30 hours to figure this out, I hope I save you some grief.