Boot to VHD / Boot from VHD

I recently learned about boot to/from Virtual Hard Disk (VHD) and how it makes it very easy to set up and manage multiple system configurations. After having my Windows 7 configuration get completely messed up and being really lazy about creating clean OS images, I figured I would give the VHD route a try and discovered it's much easier than I expected - if you can create an image in Virtual PC,