Don't bother with the plug-ins - besides the fact that they're buggy, limited, and expensive (even though Trinity is free). Export your Poser character in the traditional T-stance, then import into Maya. In Maya apply a skeletal/bone system. Since you're using v7 turn on the new FK/IK system (brought over from MotionBuilder - which is my all-time favorite posing/animation app!). Poser, keyframe, and render to your little heart's content!