The client specified GIFs at 23k, that's why I need to make Gif's.
Basically they need a Gif + an HTML file to add to their website.
When I publish my animation clicking on the HTML doesn't bring up the corresponding animation and when I open the Gif in my browser one of the layers which was static text turned up just a big blotch, but I fixed that by breaking apart the text.
I created a banner in Flash that, as I found out later, needed to be an animated GIF.
In Flash, you can export your movie as an animated GIF. The caveat...Flash only exports what happens on the Main timeline. This means that all animation has to be done on the Main timeline, as opposed to nested Movie Clips (i.e. the clean way).
I found out the hard way and had to rework it. This probably means lots of layers, as it did for me (especially since I was using masking).