Like I said, I'll have to try it to believe it
I have ATI 2010 and ATI 2012 (not installed yet) so I'll give it a try with 2010.
I'll take an image of my C: windows 7 Pro X64 boot drive and restore it to my H: partition.
If I understand what you have been saying. When I then boot the H: drive, it will be C: and everything should work as normal.
News at 11! (ish)