Mike is right! I remember when we started installing 3.5, we were told the ERD was to be left in the drive so that at the end of the process, it could copy over the needed files for cd and other items.
I had Asimware and it never copies over. I just re-installed Asimware and and it worked until I needed the ERD. So when I needed to fix the ERD, I discovered it didn't have enough room. I had to delete files in order to fit the BASIC Asimware stuff. Then it worked!
I never had a four way ide thing (sorry)
BTW, another thread...
http://www.amiga.org/forums/showthread.php?t=39742