I got OS9 mostly booting. Its locking up right when the progress bar fills (with and without extensions). Ironically I'm booting from the OS9 install that Apple put on the HD from the factory for use with Classic. I suspect it might have something to do with the lockup, so tomorrow I'm going to copy over an OS9.2.2 install from my beige G3. I don't know if this drive has a driver partition or not, OS X's Startup Disk control panel let me switch to the folder as a boot disk. If copying over another 9.2.2 install doesn't work, I'm likely going to have to reformat and install that stupid driver partition.

SOOOO close on this one.

A side effect of modifying the nvram with the compatible Mac flags (MacRISC and machine ids) is that OS X runs dog slow on the machine.