I purchased the flash exporter because of flash background transparency. However with Fusion Developer 2.5 am not able to set alpha, only RGB. This is because our game runs the SWF in a container that shows its own backgrounds. In other terms we can say that I need a "chromeless" SWF.
The beauty of this is that flash transparency premultiplies foreground images to blend with the background, avoiding harsh borders and enabling partial transparency, like in the case of a vehicle with windows.

Please tell me it is possible. Even with the good old 3D Flash animator I can export a flash with no background and the correct alpha transparency on the sprites.
Don't need partial transparency. 0 percent alpha is fine for the background.