It has nothing to do with editions and even i was using vista business till the very end. I was recently trying to bypass DSE for windows 7 on my new laptop aswell which is the same as vista, due to a patched file. Anyhow i do remember a software that could trick windows into believing a file was signed and boot with it, although i cant remember the name, perhaps you could find it when you get free time. Thanks for your find.