The Conversion Pack is a comprehensive add-on to the original Battlefront II. It adds 25 new maps - including all of the maps from Battlefront 1 not originally featured in Battlefront 2, 5 new gamemodes, a new era, and a substantial amount of expanded unit content to the original game.
Didn't hold up with the quality of the rest of the game. sad to say, i was excited to try this out, KOTOR era seemed rigged against Republic, and some maps didn't even work (alderaan specifically)