I am working with a person who is developing a slide show with sound. The sound is enormous in size (27 MB). The slide show plays for longer than 30 minutes. (It would not play for longer than 30 minutes in the flash player as a single movie for some reason). I recommended that she break the animation into separate animations, one for each slide and load the next slide from the currently running slide. She is doing that from a Next button. From slide 1, slide 2 is being loaded at level 1; from slide 2, slide 3 is being loaded at level 2, etc. Is that reasonable? Should previous movies be unloaded? For instance, when slide 4 is loaded at level 3, should level 1 be unloaded and so forth. Should level 0 ever be unloaded?