I've heard this is possible but I'm having trouble... I had an HD with OSX lion on it (couldn't get bootcamp do do anything on my usual SL system), so i put it in my MBP temporarily. partitioned and installed bootcamp on that drive, installed windows, drivers, etc. booted it up and it all worked fine. I then took that HD out, put it in a USB enclosure and attemped to start windows from it. When I started it up, I did not see the windows partition. No dice. I figured I would have some issues but I'm kind of stumped. I installed refit on the lion HD, and it showed my windows drive, but told me to insert a bootable disc on startup. I'm going to try Refit on SL next, but I doubt it will work. Any ideas? should I install windows on my internal SL drive and then winclone it over? I didn't know how to do that because everytime I try to get the SL drivers it gives me an error about "unable to locate drivers" or something like that... Maybe winclone it to a firefire drive? any help would be appreciated, I'm tired of VM's and I don't want to use up a lot of space on my internal. Not to mention i can't even get the drivers to work for SL. Thanks!