Creating face textures

I want to create a face texture like this of my own face.

Like this http://images2.wikia.nocookie.net/half-life/en/images/a/ab/Trav_facemap.png

How would I turn a picture of my face into a texture like that which could be mapped onto a head?

Thanks

See this tutorial http://cgcookie.com/blender/2010/10/13/update-projection-painting-in-2-5/
Hope helps.