Is this possible?

If I have a main SWF movie, in which I load external SWF files, and in that main SWF movie I have a scrubber bar, to control the loaded movies, do those movies have to have all their animation in the timeline?

How do I use a scrubber bar to rewind or move forward animations created by actionscript or nested within movieclips? Is this even possible?

Please advice.

Thanks