Mod maps won't run on the server unless you remove the sound folders from the maps. The +123 Mod V2.2 with the sound folders already removed available HERE
or you can remove them yourself from the files you already have.
The BF2 folder and DLC folders from the +123 Mod v2.2 must be put into your Addon folder here:
C:\Program Files\LucasArts\Star Wars Battlefront II PC Server\Addon
You'll have to create the Addon folder in that location if you don't already have one there.
That's it. If you want to run Mod maps on your server... the sound folders have to be removed from the maps and if you put them in the Addon Folder they should show at the bottom of the map list in the BBO server manager.
If you want to play the XL maps or the SWBF2 campaign maps on your server.. they are there installed with the +123 Mod v2.2, but you have to run the map manually from in game admin commands because the BBO SM doesn't support XL or Campaign maps from the server manager.. only from in game admin controls.