Is it possible to use a Vista Boot Camp partition inside Virtual Box on Mac OS X

Is it possible to use a Vista Boot Camp partition inside Virtual Box on Mac OS X

I've got windows Vista installed inside Virtual Box on my Mac OS partition. I've also got it installed under boot camp and I occasionally boot to it when I want to run windows with better performance and I don't need to run any mac apps. Unfortunately, all the data and apps in the 2 windows vista's are completely different.