Import Poser character into Max. Scale your Biped to your character's proportions. Delete your Poser character. Animate your Biped. When you are satisfied with the animation export a BVH motion file from Max. Import the BVH into Poser so your Poser character takes the motion of your Biped. Add the necessary facial or muscular transformations thru morphs that your particular animation might need. Export your Poser file using Maximum Pose (Third party Plugin) or Poser Pro Pak. Once in Max finish your animation adding effects etc. and render.