You can edit the DcadWin.MCR file that is in the SUP aka Support Files folder. The basic idea is to call each keystroke by the F# or S# on the menus, separated by the ^ (caret) between each. The first letter is the Alt-letter you want to use, and the next is usually the ; or : to start onone or the other of the main menus.
If you tell us what you want to do, we can probably help you with the specifics.
You can get a pretty good idea on some of the basic of how Datacad's codes work by visiting my website here in the Datacad Toolbar area. The some of the same methods apply to your mcr files. Good luck
Thanks! - Josh Do. Or do not. There is no try. Josh's Digital Downloads is come back online soon. Stay tuned. (soon is a relative term)