I am setting up an External backup Hard drive to primarily back up my iMac and also store extra photos, videos, songs, etc. However, I would also like to partition of a certain amount of the 320GB drive to due an emergency backup of a separate Windows PC. Is this even possible? If so, does anyone know how I should go about partitioning it. I would also be curious if anyone knows how to create an emergency bootable backup for my iMac as well? Thanks for any insight.