Also, by posting that link you're probably causing troubles by breaking rules here (I think VirtualPC is probably free to download from M$'s own site though, so it's pointless to have that link here), better remove it.
Can't really see the problem of posting a mirror of something already freeware?

But yesh, I run Bootcamp on my mac which is a fancy name for dualbooting. As far as I know, it's freely available if one has Mac 10.4 or lower and it comes with "Leopard" if your friend has this. As for needing a copy of Windows, you'll need either XP with service pack 2 or vista. This can be downloaded "illegally" (remember that you'll need XP with sp2 or higher in this case) or you can just find any old windows disc lying around in your house!

Dunno why, but I had three of them and I s'pose it's something people have after getting a computer.