The requirements for installing A4 and G4 is that you have the V4.2 Morph++ installed, not necessarily loaded in your .cr2.  Those characters feed off the Morph++ deltas for successful morphing.  I, myself, have fully loaded characters saved in my library but that is for convenience.  There is a script available for stripping out zero morph dials but, at the moment, I do not recollect the author's name and I am not on my home computer to check.  Perhaps someone could submit the link.