I downloaded the beta win7 the other day and was thinking of installing it. Problem is I don't want it to be my main machine because... well...it's beta. I do have an external (500 GB seagate eSATA) drive that I was thinking might work. Since it's still SATA it should still be fine, right? What kind of setup can I do to keep my Vista as well as use install Win7? Can I do a dual boot? Suggestions?