Bill
Reading iRMX floppies is not difficult. A DOS PC with Imagedisk is suitable (if the disks are in physically good condition).
It's not clear from your message whether you wish to read a set of install disks (which are already in image formats (e.g. version 6)) or 'user data' disks.
Incidentally, I have a 10Mb hard drive with iRMX version 7 and aim to extract the files.
Regards
Jon