With the GestureMax plugin installed to your version of 3DSMax, open 3DSMax, and click 'File -> Import'.
Filter to Poser (*.pz3 ) files and select the Poser file we just created.
GestureMax will analyse it and the GestureMax dialog will appear, presenting a variety of options to be modified:
The initial 'File Statistics' tab allows us to selection how the meshes and morph-targets will be imported.