Since the DLC was originally an Xbox exclusive, PC users must manually install the files.
The official DLC for is now available for free as a title update on modern Xbox consoles (Xbox One, Series X|S) . For PC players on Steam or GOG , this same content can be added through community-made ports and mods. Included DLC Content 2 New Heroes: Asajj Ventress and Kit Fisto
Create an addon folder inside your game's GameData directory and drop the DLC folders (e.g., DLC_XBOX ) there. Alternative: The Conversion Pack Battlefront 2 2005 Free DLC!
Most DLC mods require the Unofficial v1.3 Patch to function properly.