I have the following "hot keys" programmed in a lisp routine that gets automatically loaded
(defun C:LI () (command "LINE""QUICK,INT")(prin1))
(defun C:LE () (command "LINE""QUICK,END")(prin1))
(DEFUN C:LQ () (COMMAND "LINE""QUICK,QUAD")(PRIN1))
(defun C:LM () (command "LINE""QUICK,MID")(prin1))
(defun C:LN () (command "LINE""QUICK,NEA")(prin1))
(defun C:LC () (command "LINE""QUICK,CEN")(prin1))
Make sure that the combinations do not interfere with command you already currently use