If you want to place several keyed clips in one movie, I save as AVI, Default template uncompressed, custom and check render alpha channel. Then after putting these clips back on the timeline top trcks, right click on each, propoerties, media, alpha channel,and select straight (unmatted) to make Vegas see the alpha channel. then crop with event pan and crop, resize and position each with track motion. Hope this helps, Danny Hays