You don't need JA+ to admin your server, dedicated or otherwise.
JA+ is just a mod. Jedi Academy has "rcon" (remote control) admin access built in, just like all Q3 engine games.
\rconpassword "yourpasswordhere" (set in the server.cfg file that the server starts with)
That's all it is! Lists of commands are posted all over the place.
Now on a NON dedicated server you don't need the \rcon part. Since you're already logged in, you just type the commands:
All the commands are the same you just don't need to type "rcon" first.
Simple. Yet many people don't understand it. And they think JA+ is required! Rcon is as simple, if not more simple than JA+ to use. Good luck!