Well, I think it's really straight forward if anyone's interested. Do the sim, which generates the _VWD clothing object. Hide everything in the scene but that VWD object, and export as OBJ. Use the default (?) DAZ Studio settings for the OBJ.

Now select the original conforming clothing and open Morph Loader Pro. Select to convert From Daz Studio, and then under Choose Morph Files find the OBJ you just saved with the _VWD object, and then use the defaul settings, and click Accept.

That should put a morph dial under Parameters/Morphs/Morph Loader.

Cool.