Instructions
Download or make a completed "Jedi Academy" model. This should give you a .pk3 file which holds all the information for the model.
Open your "Jedi Academy" installation directory and open the folder "gamedata."
Open the "base" folder in the "gamedata" file.
Copy the .pk3 file of the model into the "base" folder.
Close the folder and load "Jedi Academy," the new model will be inserted into the model selection screen for use.