there is a thread about this in the Star Wars: Literature and EU universe
did some google-ing:
http://www.actiontrip.com/cheats/jediknightjediacademy.phtml
but if that doesn't help, perhaps tell us where you're stuck 🙂
(I can tell you, on a sw-board there are a lot of people who have this game)
heh... either 'devmapall (mapname' or 'helpusobi 1'
if that doesnt work, or like you said it was telling you it was cheat protected, thats when you go to the Lucasarts > Jk2 > gamedata > (i think its either this folder or the 'base' folder) And you look for the configuration file, open it with notepad and alter it as you see fit (whatever it was that was cheat protected) and then save the changes