You don't even need to swap the bootable drive in the BIOS. I use System Commander from V-Com. http://www.v-com.com/product/System_Commander_Home.html I run: Knoppix Windows 2000 Pro Windows XP (Home, Pro, and Media Center) Windows Vista (Build 5744) When the computer comes on the program asks what OS you wnat to boot to and then it does all the work for you. It is not free, but it is the best. I have been using it for about 7 years (different releases of course) and have not had a single issue related to the software. Cheers,