So, playing around with my massive (well, by my standards) conforming clothing collection, this is what I do to turn it into dynamic. To be honest, I can't remembr what exactly I did the first time to this evening gown called "Wow" to get it to work so easily, because this time there seemed to be more steps involved.

Tools: PP2010 (any version that exports and imports obj files will do), Blender 2.57a (any programme that allows you to save polygon material groups will do - I just sort-of know Blender, so that's what I ended up using).

Synopsis (is that the word I want? - maybe I meant "summary"):
--export dress as obj (welded seams)
--import into Blender
--join regions, remove doubles (confirms the welds)
--highlight edge polygons and create new material region(s) for contrained groups
--save as .blend, export as .obj
--import into Poser, parent to Katie's hip (or Michael's, if he'd like to try it on )
--so sim as above, setting new material groups as constrained groups

So far, I haven't really breached any obscure rule about using or abusing a MP item... I'll continue with illustrations to flesh this summary out a bit, if that's okay.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks