I have a windows 7 base install and a windows 7 vhd. I am attempting to create the scenario where when I boot up I have the option of loading the windows 7 base, the windows 7 vhd or a vista vhd.

I used virtual PC to create a vista vhd and then used bcdedit to set up that vhd as an option on start up. When I select that option though it goes to a repairing installation screen, fails and asks to restart (repeats if i try and select that option again).

Anyone know either a) what is happening in my situation and what i can do to fix it or b) a good tutorial/reference on how to create and use a vista vhd from windows 7