By "re-bless" I meant to make sure the System Folder for the CD was "blessed," that lets the Mac know which System to boot, for example if you have multiple OSes installed at the same time.

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I think I know what you are referring to. So if I go to System Preferences, under Startup disk, and configure the OS 9 CD as a boot disc, that should get it to work.

Currently, I only have the one OS installed, which is Tiger 10.4.