Just import any BVH ( Poser-compaible or not ). Create meshes to match those bones, set Vertex Weight, Assign bones to meshes, I used to do what you said, but in my way, it takes less than 10 mins to complete one ( or just 5 mins ) in my workflow like these. Then rendered. Sure I can use Poser OBJ instead, different workflow. Indeed, LFS exported LW's bones. I created all those LFS's mocap for Poser to use, in BVH sure.