Well, that was what I was asking. It seems that there is no standalone mod.
However, I was wrong in stating that the Onderon swoop minigame is impossible to complete. Where there is a glitch that makes the bike float, there are others that allow the game to be completed, and won. Basically, all I had to do, at the very beginning of the race, was run sideways into that statue in the middle of the track. Causes the bike to fall back onto the track without losing too much velocity and allows one to hit just enough boosters to best Jonra's time.
Still bloody annoying, but hey, it's better than using the stupid vanilla EXE that prevents the widescreen mods from working.