Help Problem with changing facepack picture

[mab89]

I got a problem that really gets on my nerves regarding editing and adding faces. How can I change the picture of a player that's already in the game? I've downloaded a facepack and the player (in this case Zlatan Ibrahimovic) isn't in that facepack, still there's a picture of him in the game. Now I want to add a picture of him when he was younger but even if I use the right "xxxxx.png" in the config.xml file the same way I do when I add other players to the facepack manually. But the old standard photo is still there after I reload the skin. Someone with an answer on what to do? 

PS, I use an Android if that's of any importance. Ds

Cheers!