2. Make it live (Modify > Make live) and use the maya´s create polygon tool to make the eye and mouth edgeloops, rough nose, chin, back of the head and finish it up. Delete or hide the nurbs head. It´s useless from now on.

Detail the eye, nose and mouth regions adding loops etc.

At this time I´ve gone ahead based upon the Krishnamurti Costa´s tutorial (www.antropus.com) on poly-by-poly head modeling.

Look for his tutorial on modeling an ear.