Any iLamp can boot the retail 10.4 disc; all but the VERY last revision can boot the retail 10.3 disc. (The last revision came out just after 10.3's release, and came with 10.3.0, but it requires its own special restore disc, not the retail 10.3.)
Only the very first generation can run any version of OS 9, and it requires its own special restore disc, it will not accept ANY other OS 9.2 install disc, from any other system. (Trust me on this one, I'm still trying to track down the iMac G4 Restore Disc set with 9.2... I thought I found one on another forum, but it's for the 15" iLamp, and the 17" iLamp I have needs even a DIFFERENT restore disc, since it was released a few months later and has a slightly better graphics chip.)
Only the very first generation can run any version of OS 9, and it requires its own special restore disc, it will not accept ANY other OS 9.2 install disc, from any other system. (Trust me on this one, I'm still trying to track down the iMac G4 Restore Disc set with 9.2... I thought I found one on another forum, but it's for the 15" iLamp, and the 17" iLamp I have needs even a DIFFERENT restore disc, since it was released a few months later and has a slightly better graphics chip.)