If it is not for re-distribution, I'm certain one may - without changing the number of vertices - take the head mesh into a 3D Modelling program ( a real one, not Poser !) and sculpt the features there, and re-export.  Or am I already stating what's been said and done... whoops. 

Dormus has turn out very nice, speaking of the Dork.

Eternal Hobbyist