Here's my problem: We have a PowerMac G5/1.8GHz in our office and I'm trying to get Leopard on it. But the drive won't read the DVD. Keeps spitting it out. I tested the DVD in our other computers, and it works fine. I tested other DVDs in the G5 drive, and they work fine. So it's not the disc or the drive. So I thought I'd boot the install disc to my MBP, connect the G5 in target disk mode, and install that way. But it won't install to the G5 drive unless I format the drive to GUID. But that's for Intel-based computers, and this is PPC. I'm assuming it's requiring that because the computer I'm booted into is my Intel MBP. I don't have another PPC in the office. Anyone have a suggestion for getting Leopard on my G5?