Alright!

The more I hear the better. Believe me,,, this does work. So, I think you exported correctly. You have a file where you put it.. desktop or better,, easy to find (Program Files>my Zmods).

You exported Weld and name body parts (1st and 5th in P6) as Mypose.obj... (ex) Open UVmapper. Import Mypose.obj. Export Mypose.uvs to Program files>My Zmods. Save Mypose.obj back to itself (Save Over).

Import/export Mypose.obj in and out of Zbrush but after finished rename to Zpose.obj just this once (ex)..

Open UVmapper and import Zpose.obj. Import Mypose.uvs... SAVE OVER or save to Zpose.obj

Don't change anything in Zmapper export options

Now this should import to Poser. And should cost you 30 seconds once practiced