Okay .. I just tried it (in Poser 6) and it worked fine. What I did was load Michael 3, click on a body part, go to the material room, add a Material as a material collection, save it as "Blank." I then went loaded a texture, saw it was all loaded, and then loaded blank and it worked totally fine.

If you are making a Mat pose for P5 or whatever you have to change two lines in the code of the MC6. I can't remember them right now but that is all you have to do. Hope that helps.