you need spark mod for this:

open spark mod and clic on browse then go down to cdimages > playerped.rpf
open it and search head_diff_000_a_whi.wtd > click on edit for open it and then > import texture
the file is "Na'vi niko"
save and have fun
for any problem tell me at nightmare_calgar@hotmail.fr
This is my creation and i accept some update
								Nightmare