nruddock, 

Thanks for the quick and helpful reply.

V3 is visible now, by only checking "Include existing groups in polygon groups" on Export. Thank you.
 
However, I'm still doing something wrong, because the Imported-Modified-Exported object's changes don't appear in V3. It looks as if the geometry modifications I've made are simply ignored by Poser. I've re-tried it a few times, exaggerating the Morph Brush tool modifications each time, but still with no effect.

Also, thanks for the caution - I backed up my original blMilWom_v3.obj before I started.

moogal, good point about the universality of this approach, but I want this geometry mod to affect all of my V3 characters, as it is a subtle "correction" for all.

Thanks,
Rick