I didn't make it!
I just got Star Wars Jedi Academy because my friend said it was a good game. I installed it, and it said that the install was complete. When I tried to play multiplayer against him, it said "missing shader files". I checked all of the pk3 files, and found that my friends assets1.pk3 had an extra folder, shaders, in it. He transfered the folder over AIM, and I unzipped the archive using WinRAR. When i tried to drag it in with the other folders, it said: file format unknown. What do I do????
That shader format is unnecessary, if you have not installed any mods, then your best choice would be to reinstall the game.