So, for my first trick I thought I'd try to create a customized System Rescue CD (http://sysresccd.org/
I've failed, so far, but here's what I've done.
Downloaded the PPC version. Followed the "How to make a customized kernel" instructions. Found that the PS3 doesn't really behave like a PPC in regards to the sysresccd, since there is no yaboot.conf or special Power boot partition. I've never looked at power architecture before, so I may just be ignorant here.
Downloaded the x86 version. Followed the "How to make a customized kernel" instructions. This went okay, except the part where I needed to cat imagefs through create_compressed_fs, so I ran that part on an x86 vmware image I have and made my ISO.
Where I am now:
I have this "hybrid" sysresccd that I can't seem to figure out how to make kboot use.
Are there any kboot gurus around?