Microsoft has changed how this all works and having just kicked a Vista 64 to the dust bin (installed Windows 7 64 bit!) I can write I'm not going back to Vista.

Let's say you need a backup of that old Vista. I thought about how I would go back and used CLONEZILLA to save an image to some USB external drive. This is not an offer to discuss CLONEZILLA but to share it is free and I got it done without reading any documentation. I think if one can install Windows, one can use CLONEZILLA.
Bob