I doubt anyone uses Fireworks, but if you do, it's pretty easy to save images for Graal's offline tools:
Choose "PNG8" from the optimize toolbar on the top right, then choose the proper transparency method (usually "no transparency" or "alpha transparency"). For images with more than 256 colors (which won't work with offline tools) use either PNG24 or PNG 32. PNG32 supports transparency (including semi-transparency) while PNG24 does not. Use "File > Export" to save it.
You can also use "File > Image Preview" to see how it will look and export it.
Sorry for hijacking your thread, Dusty.