No, I didn't have any difficulties booting. If you are, there's a couple things I'd try. First off, boot into Open Firmware (hold down the Command/Apple key, O, and F while booting) and enter:
reset-nvram
reset-all
at the prompt to clear the NVRAM settings, then hold down C while it's rebooting. If it still won't boot from the CD, try booting into Open Firmware again and try:
boot cd:,\\tbxi
If that doesn't do it, I'd double-check that your CD image is good and burn a new copy.