Ok. second question. How do you make a movie, or a symbol within a movie larger than 2800 pixels wide? Or appear to be larger than 2800 pixels wide? Look at http://www.barneys.com or http://www.kwakualston.com. The content on Barney's site "appears" to be extreamly long - 6400 pixels. It looks like there is just one long movie that one can slide to based on the How did Josh Davis do this?
the size of objects displayed are not constrained to the size of the stage. they will just be cropped to that size upon export, and the way you embed it into the page. so if it's cropped, you can make objects as large as you want and scroll them onto the visible part of the stage, to create the effect of one long element.