It's just another morph target, that affects only the mouth and the philtrum.  It ought to mix with any other face morph just fine, although if you mix with a specific face morph that heavily reshapes the mouth there might be some problems.  

At this time it's a single morph that affects the whole mouth, but it literally took me 30 minutes to do, so making separate morphs that do different things like exaggerate the left/right bulge on the lower lip shouldn't be very hard.  Either show me a picture with some notes that explains exactly what you want, or state it as explicitly as you possibly can in writing.  You could likely do this just as well on your own if you have P7, or practically any external modeling app, it really wasn't very hard.

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