If you want to save yourself a lot of trouble, you ought to consider using a program called "VMware". It lets you run more than one OS on a single hard drive, heck, 8 in the same folder. I say this because it actually makes a TINY file that serves as any size HD you want although the default is 4GB.
I tried everything, dual boot OS, multiple computers and use of a KVM, and all of these options...VMWare does it for me. I can run up to 8 different PC's on the same computer, they have their own IP, and technically each vitrual machine uses its own HD, CDRom, floppy, NIC, and soundcard even though it is simply using the one on your pc. You can literally drag files from one PC to the other and it works!
Granted, this program does cost a considerable amount of money depending on what you want...however, there are ways of getting it otherwise. :evil: (not that I would).