you don't understand!!
in a 3d models , there is 3 parts
texture
polygons
bones
bones are the structure of the model , when you make them move , the
model moves , their are used to animate characters
polygons are a bunch of faces that are moved according to the bones theiy are linked
textures are the only thing you see of the model in games . they
are deformed at the screen according to the polygons.
to fit on the polygons , texture are 'mapped' onto faces (polygons)
by UVW coordinates .
so now you must understand ( i hope

) how its working , you make a model , you anim it with bones , its ok .
then , you paint two textures , one with tonyhawk clothes and face , and one with your face and your clothes , and you use that texture on the polygons .
did you catched all ?
A program is sensed to be a conventional mean to give orders to a computer and not being obscure,weird,and full of traps ,that is closer to magic stuff (Dave Small).