I've got an iBook G4 1.2Ghz, and it's been running 10.3.6 fine. I decided I wanted to install Mandrakelinux on it, along with separate partitions for Jaguar and Panther versions of Mac OS X. I connected the iBook to my Power Mac G5 via Firewire target disk mode, and used the pdisk Unix command-line utility to format the drive's partitions. After hours of work and getting myself extra confused, I figured it all out, and now have Linux running on the iBook. During this process I was also doing many Open Firmware commands, some which I was entering without any idea of what they meant. Now I want to install 10.3 on a partition, but when I boot up from the install cd, I get the prohibitory sign, as seen here: http://docs.info.apple.com/article.html?artnum=106805 Anybody have any idea what may have gone wrong? Did I screw up the firmware? If so, is there a way to reset it? I've reset the NVRAM/PRAM. When booting from the hard disk, I get blinking question mark, which is obvious since I have no Mac OS installed. Yet Linux works perfectly fine (I imagine because there's some OS X specific stuff that's gone?). Thanks.