PrecipitFX doesn't seem to add the effects for UT2 aircraft located at  SimObjects/UT2 Aircraft. Wondering if there is a way to add the effects instead of modifying the Aircraft.cfg one by one?

Not sure how PrecipitFX works, but would renaming the folder help? First make a backup copy of "simobjects", then rename "Airplanes" to "airback", then "UT2 Aircraft" to "Airplanes", run the installer, after that rename everything back the way it was.

Good idea, I am gonna do it.