they can be loaded with the new setdmd, just set the file association for .dmc files to setdmd and you can open up to 15 files at a time.
highlight 15 .dmc files in windows explorer, press enter and it'll open 15 sessions of setdmd, rinse and repeat for all of the files, you can do the whole folder and then close the 300 or so sessions of setdmd without any ill affects.
but you'll probably need to edit your registry first, to enable colourizsing of the dmd for all tables. export your registry, change all instances of
save, and import the registry