What you need is a Digital Camera, and a tirpod. Make sure the room is very dark and set up the game.
YOu might need to fly the mission a few times, but when you get s scene that you think you like, take a picture. Quit out of XWA, save the picture using the digital cameare, and Vola
or you can install the 2.02 patch, and hit [cntrl]-[printscreen]