To use this all you need to do is use the Launcher and pick 
Goku.  Then put this cog into 
C:Program Files/LucasArts/JediKnight/Resource/Cog
then start a game and pick the character just like you
do when ever you use the launcher and when you level 
your skin will change accordingly.


This only works with the LEAKED BETA of DBZ4.0 AKA DBZTDIR.
I am in no way affleated with the team and found this out with
the help of a few people.