Figure I might try to get some help from my favorite Mac Community Anyway, I have an older PowerBook 12" and an extra Mac OS X 10.5 disc (unused since I bought a recent MBP). Problem: the combo drive on the PB is out of whack. Question: what's the best way to install Leopard on my old PB? Here's what I tried: I put the PB in Target disk mode and connected it to my MBP via FW. I booted my MBP with the Leopard disc thinking I could select the PB HD as the install destination. However, the install instructions require that the target drive be a formatted GUID partition (for Intel Macs), but it doesn't work for my PB since it's a PPC. Any help would be greatly appreciated. Thanks!