I may have bitten off more than I can chew, when I took Judy's head and modified it to look like my wife.  The resulting OBJ can be put in as a morph target and shapewise looks good.  All the expression morphs still worked, which is what I wanted.  Trying to force a distorted picture of my wife into Judy's head template was poor, so I decided to try making my own replacement head uv map.  In Blender things are looking better.

Before I spend hours tweaking more uv verts around I thought I would try inserting what I have so far.  Here is where I hit the wall.  Using a text editor, I replaced the head vt's in a copy of Judy's OBJ, with the vt's from the Blender OBJ of my wife's head.  When I tried everything in Poser --Ouch!  A quick check showed Judy's head had 6565 vt's (almost the same the number of Judy's and my wife's verts),  which I had replaced with 25918 vt's.   I expected some growth due to the different seam cuts I used, but not like this.  I also noticed duplication of vt's in the Blender OBJ export.

Somewhere, either my understanding or my technique is flawed.  So here I am needing your help.