The safest bet for legacy patches. Look for the "Battlefront II v1.1 Patch" uploaded by the community.
However, if you are running an original disc installation or a "preserved" version, you’ll need the standalone patch: Download Star Wars Battlefront 2 V1.1
If you own the game on or GOG , you’re in luck—these versions are already updated to a modern equivalent of v1.1 (and even include restored multiplayer). The safest bet for legacy patches
Massive overhauls like Battlefront Recon or the Extreme Mod often require the 1.1 executable. Download Star Wars Battlefront 2 V1.1