I have made mapkeys with a combination of keystrokes with a couple of mouse clicks to save the current drawing file as a dwg.
After naming and describing the mapkey, I turned on Record.
Alt-F, Z A (file saveas Creo 2.0)
I had to mouse click to change from .drw to .dwg.
I mouse clicked to get on the name bar.
Home key (to move the curser in front of the existing name).
v ( to add the letter v in front of the name for the in house viewer program).
I mouse clicked enter (though I may have been able to enter from the keyboard).
I stop recording.
Clear the file that had been made while creating the mapkey
Tested and it worked.
I hope this helps.