I didn't make it!
OK, sorry to bug you people again, but how do I become a modder FOR THE PC?! I got the pack for the X-Box from the link. Now I'm afraid I'll get a link that makes things for the PS2. Please help.
First, you need to download this huge file (it may take a while): Star Wars Battlefront II Mod Tools (PC), Star Wars Battlefront 2 Downloads, Star Wars Battlefront 2 Other Then you need to follow the documentation included. Try reading the "Getting started" file in there. That should have the info for starting a beginner's map.