This link might help you a little bit with your Supra Turbo, I know a couple people in our club used to have this in their 2000, but I don't remember much about it (too long ago!). I am pretty sure the cpu card points towards the drive bays.
The 2.04 ROM in the one 2000, does it have PIN1 wired to PIN30? I'm pretty sure it needs to have that with your motherboard revision.