I was thinking about this for a while and I haven't come across it in any of my reading. Could you split an os over two drives? Example:
drive hda, 35GB xp - 5GB fat32storage / hda1 8GB root - 2GB swap
drive hdb 10GB usr - 10GB home -10GB var / hdb 10GB root linux#2
hdb 1GB swap - 9GB user - 5GB home - 5GB tmp I hope I made this clear enough I'm sure someone must have tried this before. Maybe I got too much time on my hands.