Create a complete head rig, with facial animation controls as recommended by Jason Osipa in his book 'Stop Staring'. Starting just with a head mesh, create bones for jaw, head,neck and eyelids. Also create a couple of spline controls for the eyes and the chin. Running the 'eyerig' script creates a rollout with pick buttons for all needed bones and meshes, then sets up the eye and head rigs, as well as placing a skin modifier on the mesh, with the required bones added, ready for vertex weighting. The rig also caters for 'fleshy eyelids' that move with the eye.