Wouldn't it be easier to work your animation in Max, export it as a BVH into Poser and then export your entire scene into MAX thru Maximum Pose II or Pro Pak for rendering? I can imagine it will be hell to export morphs into MAX besides the obvious Physique work you will have to do to fit the model into the Biped. That way you can use all your available morphs in Poser and then export the results back to MAX.