Looks familiar, but I never used it.
We also had a utility that defined f11 and f12 appropriately named f11f12.com
EDIT
I finally remembered how we used these things. They had to be loaded into the acad.bat file for starting autocad. QKey.com redefined the keys and MRKey.com changed them back. You had to careful about how they were loaded and how many lisp routines went in or there would not be enough memory for autocad to load properly. Our first machine had 1mb of single chips mounted on the main board and there was little memory to spare.