Just a 10 minute fix using colorcurvature's script and zBrush.

"Click" Export
Sculpt the POSED mesh in ZBrush (Or wherever you like)
"Click" Import
Finished.

Thank you for the kind words, colorcurvature ! :-)

All I can say is, this little script is the final piece of the puzzle I was trying to complete when I started my quest for more realistic Poser figures 10yrs ago.

Since then there were lots of improvements in rigging, lots of better ways to create our own sculpting, lots of helpful add-ons making our work easier.

But this script gives us finally 100% CONTROL over what we do in Poser.

We can now easily export a welded, pre-morphed, pre-posed-and pre-scaled figure out of Poser into a professional sculpting software like ZBrush, do anything with it we like, and get it back into Poser as a fully working figure again.

With just a few mouseclicks.
And with PERFECT results.

Even the most extreme poses causing severe "broken" joints are now easy to fix.

JCM morphs for clothes are child's play now because you can work in ZBrush on the POSED clothing.
(And unlike using MorphLoaderPRO, the results are PERFECT in Poser !)

For anyone interrested in more realistic joints, for anyone interrested in better fitting clothes, for anyone wanting  to seriously speeding up their workflow when rigging content for Poser figures, this script is a MUST HAVE.