Hmmmm... Well, I have THOUGHT of experimenting with something. Paint the vertices on the model in Zbrush as a texture that are the lips and then begin morphing. The painted areas would help you keep track of where the lips were while you were morphing and then remove the texture before exporting. Now I have not TRIED this yet and don't know the specifics around applying a texture and removing one and if this impedes your work later in ZBrush when you reimport it, but it might be worth a shot. I understand your pain on this one. While doing the Apollo RKane_1 morphs, I was trying to increase just the size of the mouth AROUND his lips and misjudged where the line was. Needless to say, he looked like a collagen implant gone bad when I brought him back in. I wound up just getting a snapshot of his wireframe with the lips material highlighted and kept it by my computer for reference to "eyeball" where the lip line was. It was the simplest solution at the time to try and get the job done quickly. I was trying to finish before Christmas...and I DID!....well...for the first draft of him, amyway. smile Hope this helps!