you should be able to get the software for "Disk Masher System" compressed floppy images off of aminet.net
look for 'undms' or similar, if you're not happy with shell based commands, look for 'dmsgui' and see what that gives you.
it should ask you to put a disk into drive dfx, and uncompress direct to floppy disk. or if the software you have supports one, setup a rad: drive and uncompress to that. much faster.