Thanks for sharing! For producing multiple banners, it wouldn't be optimal though.
1) Having a PNG sequence instead of one PNG, adds on file size, maintenance and file load calls. You have to optimise every frame instead of one.
2) Too much manual work if your doing multiple banners.
This is how it works in Adobe Edge Animate, you go File > Import SpriteSheet. You first select your PNG spritesheet. Then a dialog opens up, lets you load an EAS file. Set duration, FPS, done. Some more options if you don't have a EAS file...