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. 

I think you would be better off using UVMapper classic to take the new UV info from your obj and transfer it a copy of the  obj file in the Geometries folder.  Either create an copy of the cr2 that point to the new obj or just back up the original obj and replace with the new.

Thanks for your response, Jestmart.

I have UV Classic, but never used it.  The vt's I need to change are in the copy of the full Judy OBJ.  UVmapper shows a map of everything on top of each other, but I only want to change a the skinhead and lips material portions of the head group.  I am not sure how to isolate on just those portions using UVmapper.  The UVMapper tutorials I've read, so far, are too simplistic to cover this.  If you know of an advance tutorial or documentation that covers this, please sent the link.

So far, when I try UVMapper, I get error opening the material library for my copy of Judy's OBJ (the original Judy OBJ does the same thing, so I will ignore that). And I get a warning that my replacement head OBJ has uv coordinates out of range, which I'll try and fix before going further.

Thanks again for your help.  With some help, studying and experiments maybe I can chew this.

Sorry didn't read original post careful enough.  Changing the seams is a problem.  I also thought had the entire model, not just the head.  I use Composer (think thats the name of the utility) to move morphs between apps so I always work on the whole figure.

Thanks anyway.

I tried importing the UV of my wife's head, while I had UVMapper loaded with my full copy of Judy, but it wouldn't take it.  The only way that comes to mind is to use my wife's template as a background picture in UVMapper and move all vertices by hand (Ouch!), then save the whole geometry. 

Do you know if the expression morphs in the CR2 would still work after all that effort?

I think at this point you may want to do a search for frankenstein-ing a new head onto another Poser body and see if that would work .