By slide menu you mean something like a menu bar? I don't really get it. Post an image if you want.
I recommend to create your menu inside dreamweaver using html and css and not in fireworks, because your site is going to be really heavy and not compatible with the web standards.
But, to answear to your question: Since you've got a complete menu with slices, or symbols such as buttons,export it as html and images (be sure to export the slices too).
Inside dreamweaver use the Insert > Image objects > Fireworks HTML. Browse to your exported file and press ok.