Just tested this dms with DMS 1.11 (Aminet) and I could write it back to floppy without a problem
But it HAS some read/write error if I start it, but thats of course something you may fix
P.S : If I test the file (DMS TEST BROKEN.DMS) the archiv seems to be ok too :hoo
//update : Just for info usage, the following files are damaged -> DMSpell3.pic, View.lo and anim/title
Nice hint disk btw.