How To Installing OS9 on Second Drive

Two questions:

1) Can you boot OS 9 on this Mac?
2) Are OS 9 drivers installed on the panther drive and/or the spare drive??
If you can boot in OS 9, you need OS 9 drivers to install OS 9 and be able to boot from it. If you just want to run Classic under OS X, you don't need OS 9 drivers.
->in Disk Utility, check to see if the spare drive has OS 9 drivers installed.

I. If 1) and 2) are YES:
-> boot from OS 9 CD and install. I would put OS 9 on spare drive so you can boot from that to work on damaged panther drive when necessary.

II. If 1) is Yes and 2) is NO AND you want to boot into OS 9.
-> backup and erase spare drive and reformat including OS 9 drivers. Go to I.

III. If 1) is NO, you either need the original Software Restore CDs or you need access to another mac that has Classic/OS 9 installed.
->Use Software Restore to Install Classic. It will be installed on the panther drive. Either leave it there or drag/drop it to the spare drive and erase it from Panther drive.
->Connect OS 9 Mac to your mac by networking of FireWire target Disk mode and drag/drop Classic folder to where you want it.