Quote - .. Is it possible to import already modelled cloth props (dynamic cloths) from Poser into MD and have a play, like to adjust, drape, or whatever else, in MD then, and perhaps re-save and finally import them back into Poser?

No, MD will only drape stuff that was made in MD as flat cloth shapes stitched together. And it will only drape them on one 'avatar' object (or several objects contained in a single avatar file).

So you can't just pick a few objects in a scene to clothify and pick a few others to collide with, as you can in Poser. Maybe that'll change in the future, development is moving along fairly swiftly.