Sadly can't help you but I am very interested in using Blender for Poser and D/S clothing. Your work looks quite good already IMHO.

Maybe small folds and X and Y formed wrinkles could be done with an additional displacement map ?

To Admin or Moderator: I would be most grateful to have a good solid (read idiot proof :)  ) tutorial on the whole - export character mesh from Poser, build clothing in Blender, import back and use - process. This could also be cross linked to the DAZ and Poser forums.