Added a second hard drive to a G4 733. Tried to boot from an OS 9 CD, but I got an icon of a folder with a flashing question mark alternating with the Mac OS faces logo on it. Then the computer gives up and boots the current system. I tried sharing the CD from another Mac, but I got a message about reading the documentation. Anyway, I can't figure out what's wrong. Wondering if anyone can help me figure this out.