The Ultimate Pack adds a launcher which allows you to easily switch between your custom mods (anything stored in the 'Star Wars Battlefront 2>GameData>Addon' folder), Galactic Conquest Mods, a choice between two different mod packs he's put together and also allows you to play without any mods and just the vanilla game. He's made this addon to be available for various different languages. The addon is made by '|)in-d1n' (Artemiy) whom is from Russia. It does not give you the game for free, you are still required to have the base game.
This has been out for quite a while now and it's a sort of addon for Star Wars Battlefront 2. However I'm just here to share it with those who may not have heard of it. I want to start off by saying I did NOT make/help make this, I have nothing to do with the development of this.