You must create the player before in your rosters (Collison, Milicic o James, for example, are not included, obviously, in last nbalive.org roster or in default rosters) and then create the bat file including the info (correct name player, skin color, fsh files and bin files...).
Your Fsh/Bin files will be recolocated in art/ingame/players folder and the new player will have a new face if you've created correctly the files and the bat info.