Problem with 8.2b2

[Scott]

I have a Powerbook G4-400mhz titanium. And when I insert the burned iso it brings me to apple's openfirmware prompt,  and if I try to load it up again I get a "default catch" message. I used the checksum to see if the iso was good, and it was. I have no idea where to begin to try to figure out the source of this problem.