I hope I'm not stepping on anyone's toes here.  I haven't had time to read this whole thread, but I want to clear something up.  Morphs do not need UV info.  It is simply a record of what vertices are moved, how far, and in what direction.  The actual object carries the UV info.

I also want to warn you, if this has not been covered, to never use exrtrusion when making a morph.  Only move the vertices.  Poser will reject any morph that has the wrong number of verts.

John