I didn't make it!
well this is easy but cool
- Go find your jk2mpconfig.cfg in your GameData/academy folder
- Add it to a .zip file
- Run it
(note: read only but good info) it may not work but it worked for me before
double click on the .cfg (like jk2mpconfig.cfg) and when the computer asks you what you want to open it with select wordpad or notepad. Then you'll be able to edit it ;)