I was just about to follow one of the how-to guides to installing Vista on your AAO using a USB flash or hard drive when I realized that Vista requires a license key to activate it on your computer. None of the guides mentioned this so I was wondering if you have a Vista disc that was already used for another computer, can you still use that disc to create the Vista installation for a flash or hard drive? I assume the installation would be the same as if on a disc and the software will ask for a license key for activation? I've never tried installing the same Vista disc on two different computers but I read that you can't do that. So does this mean that to use those how-to guides on installing Vista, you actually need a brand new unused copy of Vista? If that's the case, then I'm glad I asked before I went through with it! :) Thanks for any help on this.