Unable to boot OS X cd after installing Linux

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.

Thanks for the reply.

Like I mentioned, I've already reset the PRAM and have tried numerous times to boot up from the cd, without success.

Not sure what to do from here...I don't think it's a hard drive issue since I can get Linux running fine. Oh well I'lll keep searching

Yes I reset it via OF.

Is there any way to reset the firmware? The first time I installed Linux, it said that I had to enter this command because the bootloader wasn't correctly installed:

setenv boot-device /pci@f4000000/ata-6@d/disk@0:2,\\:tbxi

Did that screw it up?

I am able to enter "printenv" and get a list of all the OF variable and their contents. Anybody know any variables that should be "this" and not "that" ?

Well guess what?

The problem is NOTHING to do with my computer, but the OS X cd I was using. I guess the newer iBook G4's only boot a certain OS version, and using the iBook's system cd's (Mac OS 10.3.5), it boots perfectly fine into the OS!!! What a simple fix for what appeared to be a huge problem!! Thanks all for the help!