This can be done with an image strip. Some programs can export animated gifs as image strips. I've used Alchemy's gif construction set, conversion from avi to gif may give you some problems try PSP. Apply the image strip to a long rectangle, note the number of frames and have the same in your Poser movie, slide the square down to the start, make your movie frames the same amount in Poser, last poser frame is where the last image strip frame is. Just create you own viewer but be aware of the fact that the image strip needs to be hidden above and below. The effect is dramatic, if you alter the number of frmaes in Poser you can get a rolling effect on the image strip. Good fun!