I just took the textures from all the general students and replaced the green uniform with Jimmy Hopkins' uniform.
Open the world.img from the Stream folder with IMG Manager V.2.0 BETA, import the .nft files from the mod folder and replace everything, then go to "Edit" in the top corner and click on "Rebuild Archive", when finished enter the game and see if it works. Remember to make a backup of the original textures.
