"norrebo” blogs about his experiences backing up his PowerBook to an HFS+ volume that he also accesses from his Windows machines using Mediafour’s MacDrive:

The total cost for this adventure was $265.94 ($188 for the disk, $27.95, for SuperDuper!, and $49.99 for MacDrive). But knowing that I’ve got a bootable image of my Powerbook disk? Priceless.

via The Simple Life. Glad you like it, “norrebo”, and thanks for sharing the technique you use!