Well, I've got an A4000D with a similar setup. Do you have the 3.1 floppies to boot off of? A few times, since I had no data on it I needed to save, I formatted my IDE 4.3GB hard drive with my 3.1 floppies usind HDToolBox, then installed ASIM 3.1 with my floppy disk. Works like a charm.
Best of luck.
