Just FYI;

I got it all running again. I also upgraded the RAM to 256MB

The solution was:

Got Mac OS 8.5 , which booted fine.I installed it and upgraded the firmware with the files from the OS 9.1 CD.I then upgraded to 9.1.

Installed OS X Panther on a separate partition.

Works perfectly. I may try to shoehorn in Tiger on it as well.

So far it has shown no issues, except from the fact that the HDD is a little loud. No cracks as far as I can tell.