It would be a nice If you could buy a sata split mod just for this....... An idea for the developers. shouldnt be too hard, split sata line into 2, and put the power on a relay hooked to the cr_en pad for the demon to change which drive is enabled for each nand. as for the phat models it would require a little more work, because the hdd is outside and not connected via a sata cable to the motherboard, so most the board would have to be in a custom hdd enclosure that held 2 hdds, and a new plastic piece that the hdd connects to with a pad for cr_en, and a pogo pin type setup, or what they use to connect the battery packs to the controllers, so you could still take off the dual hdd setup, and plug in your buddys hdd and still use it.