And it hasn't to be floppy where you extract them. RAD: drive or some virtual floppy drive on hd are just fine too. It's much faster to extract dms on them than on disk.. for example when you're installing some multidisk program from dms archives.
Example:
mount rad:
dms write disu.dms to rad:
Nondos disks won't work with other than real floppies though.