Huge fan of Jedi Academy, and The Old Republic. So i mashed them together.
To spawn him first enable cheats by typing "helpusobi 1"
Then type "npc spawn darth_jadus" to spawn him.
And "playermodel darth_jadus" to look like him.
Just put the pk.3 file into your Jedi Academy base folder.
This Darth Jadus does look very low-resolution compared to the SWTOR version, but i wasn't able to find ANY Darth Jadus mods and Jedi Academy is outdated compared to newer games. I also took the liberty to put an important Readme file with the Jadus mod, as that will answer most of your questions, and provide more information. Revanknight created a skinpack, from which i took bits and pieces to create this.