You haven't said anything about your accelerator/RAM expansion. I would pull that and everything else off the motherboard and boot off the internal floppy.
The install the acclerator card libraries
Then add the accelerator with no RAM.
Then add the RAM.
Then add a blank hard drive on the internal IDE and install workbench.
Then add the FASTATA. Then add the hard drive above to it.
Then add the mediator
Then add the indivision.
