If you are using the Fireworks to Corona Exporter extension, I suggest you to download the new update (fixes some small issues and add support for Sprite Sheet animation), available here.
To generate the Sprite Sheet tags, simply create an image layer and name it with the string “sprite”. For example, you layer can be:
- myAnimation sprite
- space for sprite
I am working on a Sprite Sheet Exporter for Fireworks too (similar to the one I created for Photoshop).