Installing OS 9 on Clamshell

I'm having trouble getting my Clamshell to boot into the OS9 installer. I do not have the original copies of the OSs that came with the computer, but I'll tell you what I do have: 9.0.4 and 9.2.1, both on CD. However, neither of these can boot the machine. It goes through the motions as if it's looking at the CD, then just switches to the grey Apple logo and moves on. Holding down the Option key at boot does not show me an option to boot from the disc in the drive.

Is there a way to get OS9 installed on here now that Tiger is already installed? I could start from scratch, but I don't want to if I don't have to, and besides that, if I could start from scratch you'd think the system could boot off the CDs. Do I need another version of OS9 to get it to work? Here are the system's ROM version and specs.

Machine Name: iBook
Machine Model: PowerBook2,2
CPU Type: PowerPC 750 (22.2)
Number Of CPUs: 1
CPU Speed: 467 MHz
L2 Cache (per CPU): 256 KB
Memory: 576 MB
Bus Speed: 67 MHz
Boot ROM Version: 4.1.7f4
Serial Number: UV10100EK1L
Sales Order Number: Z02J00K7T

Thanks for any help.

Thanks everyone. I have some old audio equipment and software I wanted to play with in OS 9 as I figured I'd have a better chance at running a multitrack system without the overhead of OS X (hey, if a PowerMac 9600 can do it...)

I'll give those thoughts a try.