About that, let me tell you a beautiful story..
A few weeks ago I was craving CM so much that I decided to install XP on my laptop afterall. Made a small partition for it. Of course I needed my normal environment back and since you can't install XP as easy as other OSes, I wiped the drive (XP install wouldn't start cause it couldn't figure out my partition table) and reinstalled. Then I wanted to restore my Gentoo install. No problem, made a partition, extracted my full system backup from one tar archive, fixed the MBR, all set. 
