from Lifehacker
Because I’m a sucker for a good-looking operating system in beta, I downloaded and installed the publicly-available Beta 2 of the next generation of Windows, called Vista, this weekend.

Now, Microsoft says only developers, testers and those “experienced in PC troubleshooting” should install this on a spare machine. But I’m young, stupid and reckless so I installed Vista on my main PC which is the only machine I have souped up enough to handle the Vistage. I didn’t want to let go of XP, though, in case everything went to hell. Thankfully all turned out well: I now have a single dual-boot PC that can run either Vista or XP.

I don’t recommend you be as dumb as I was, but in case you are and you want to dual-boot XP and Vista? Here’s how I got it done.