Anyone aware of this MSDOS program or similar for use on the Amiga? Some time spent on the web and Aminet did not reveal anything. No PC at the house and the machines I have left with floppies are the Amiga and ST.
Nope, the only closest thing is CrossDOS.

You could possibly write custon DOS Drivers for larger DOS disks. But you wont be able to write MSA or ST images to a disk unless you write a program. Just do it on a PC. Get Floppy Image for XP, it works great.