Just want to say thanks for those that took the time to answer my last post. Ok let me ask this? Is there anyone out there with a similar system, xp home,1900+ athlon, geforce 2 400mx 512 ram. If so please go to meigs during day,have FPS set at 18 20 24 and unlimited go to side view and start up for take off, does it stutter yes or no? Could it be my video card? I have latest drivers. Signed, very frustrating and not very smooooth. Could it be that if the computer is to fast for the video card you have the jerking. Sorry to be on this subject so long.