I'm currently trying to convert a Powerpoint presentation that has seperate audio and video files of different lengths for each slide. Usually, the audio (narration) is longer than the video. Normally, in a Powerpoint slide show, the video would pause and show a still of the final frame until the presentation was advanced to the next slide. But with my authored Presenter SWF, when the videos finish they simply dissapear, and the narrator keeps yammering to an empty slide! That's no good. What's going on here?