Best option for extremely long animations?

so flash SWFs are limited at 16000 frame limit. What is the best way around this?

dropping frame rate to 15 fps helps somewhat (makes a longer duration) but even with that the limit falls somewhere around 16 min.

Does anyone know if multiple scenes or slides is a workaround for this? ie. can you make one scene 15000 long, then another 15000 long, etc? Or do I have to have multiple SWFs loading one after another (1a, 1b, 1c)? I know FLV’s don’t have the frame limit but this animation will be way tinier as SWF due to just vectors for most part.

thanks