Michael,
He's refering to the "download" link at the bottom of this web page.
http://msnhomepages.talkcity.com/MSNGamingZone/davidgrouchy/index.html
It's level editor. Paint out a labrinth floorplan. Use <page up> and <page down> to do multiple levels. Plans can be saved and loaded. It has printer support. With one click it will convert the labrinth into a 3D Quake level (registered version required).
The DMG are my initials.
David Michael Grouchy II