Here's a tip that I can give you... Cut up the lips, nose, and eyes and paste them each onto the texture template. position, scale, and rotate these elements so that they will line up properly with the geometries, using the coloration/texture from the picture air brush/stretch/add the forehead, cheeks, chin, etc... An easier way that I've experimented with, to a limited extent, is to use a morphing program with a warping feature. You could use this to stretch the elements of your photo to the layout of the texture template. From there, you can do a little touch up, then it's just a matter of getting the right morph targets so that the actual physical structure of the face is close. Let me know if that seems useful. I'd be happy to help out if you'd like.