Actually the problem is with the AirHauler program, when I accept a job the program immediately starts FSX. I need to run FPS Limiter because it tends to limit my freezeups quite well. I tried to change the FXS path in AirHauler to use the Limiter but then it states it can't find FSUIPC4. I also tried to cancel and reload FSX but then AirHauler gets confused and my payloads and fuel are all out of wack. So does anyone know how to engage the Limiter before FSX ?

Try AlacrityPC a free download at Avsim, and you can configure it to load any program prior to starting FS. Might be your answer....fisheye