Yeah, it's in C:\Users\<username>\Saved Games\ThirdWire\StrikeFighters2 Vietnam. The weird thing is that the problem occurs no matter what files I put in it - originally I had the whole Air/Ground war expansion installed, then when that stopped working I tried using only SARCASM v1.5 (after moving the original flight folder away of course), then in desperation I tried using a completely empty folder. Nothing works! But as soon as I delete the folder, the game runs perfectly... From my understanding, using a completely empty 'flight' folder should have the same effect as using a mod folder without a 'flight' folder at all. Yet for some reason the game crashes immediately with the first option and runs flawlessly with the latter. Also, all of the other installed mods work fine - all the additional aircraft, terrains, cockpits etc run without a hitch. Can't imagine what could be causing it!