I am experiencing the exact same problem, and have been researching for serveral weeks to no avail. Did you ever find a solution? Thanks!
Fireworks HTML is really messy (as is Photoshop HTML) and unless you are highly proficient in HTML and back end coding to clean it up and make it work with your page(s), you'll have more trouble than it's worth.
The concept of a drag and drop slideshow is a novel one but not very realistic.