Misty, Sculptris can absolutely make the morph that you want and poser will accept it.

However, there are rules.  You must export only the part that you want to morph into Sculptris.

As you know V4 is broken down into hip, chest, face neck, right thigh, left thigh etc.

If you want to morph portions of the face, export ONLY the face as an .obj into Sculptris and include only As morph Target, Include body part names, and figure name in polygon groups into Sculptris, make your morphs and save as a .obj

Then in Poser, press load morph target and select the .obj.

A dial will appear so you can adjust the morph.

DO NOT LOAD THE COMPLETE V4 BECAUSE YOU WILL GET WRONG NUMBER OF VERTICES WHEN USING MORPH TARGET.

If you can export your V4 part save the head, remove the clutter from your hard drive using a good cleaner tool that removes junk from your registry, temp files cache etc.  Jan