How does one make screen stills? I mean I downloaded this movie. I played it in several diffent movie viewers. I paused it at the moment I wanted. I took a 'print screen' of the screen and then saved it as a image file. When I opened it up the area where the movie still was suppose to be was black! Why? How does one create ones own screen caps? There isnt any special software needed right? Whats the secret! Please tell me!