I am trying to install Linux on my iMac G3 (400 mhz, slot load DVD, 512 mb ram, 10 gb HD, OS 9.2) I need to do this to be able to use it on our school network, the tech guys say that the old OS won't be recognized. Anyway, I put the image on a CD and popped it in the drive. When I boot, the drive recognizes the CD and I can see its contents. So, I powered down and rebooted holding the C button. I thought this would bring up a screen so I could boot from the DVD, but it only shows the HDD. How do I force the computer to boot from the DVD? I want to install Linux completely over OS 9.