The hard drive does seem to spin up, I have felt vibration when power is applied to the computer.

I don't know what you mean by Apple HD SC Setup or Drive Setup, I'm relatively new to Macs (in fact, this is technically my first and only).

The terminator was jumpered to "off" while it was in with the original drive, the original drive is automatically terminated (no jumper) and is at the end of the cable as I understand it should be.

I have not set a unique ID on the drive, I had considered that one of the problems. At the moment I only have 1 jumper and I cannot set an ID for both the original drive (which doesnt have one set as it is) and the new drive at the same time. I may be able to dig around and find an extra jumper if you believe that may be the source of the problem.

Thanks fr the help so far, look forward to hearing more =]

Edit: I was able to track down Drive Setup 1.5 through google, an article said it was the suggested software. I'll port it to my pc that has a floppy drive and try and get it over to my Centris and see what I can do from there.