The application itself has not been modified, but all BF1 & BF2 shipped effects/textures are now supported and can be viewed within Particle Editor.
You can download it HERE.
Just move both the munged folder and the .exe into this directory, and it should work like a charm.
Customize Away!LucasArts\Star Wars Battlefront II\GameData\DATA\_LVL_PC
--GT_Skyhawk