Fireworks exports "prototype" HTML, that's it. It's extremely fragile, and will break if you do much (or any) editing. If you want to design web pages this day and age you either need to learn HTML/CSS or partner with/hire someone who can. If this is a one-off project you might consider outsourcing the cut-up to one of the many Indian firms that will do it for a few hundred bucks. Search "PSD to HTML" if you want to go that route.
In Fireworks (CS4 and CS5), you should better use the option:
File > Export > Export: CSS and Images
The code generated will be quite good for a prototype (valid or almost valid XHTML 1.0, pretty good CSS) and it will be much different from the code generated when using the option "HTML and Image" (you'll see some old style HTML tables when using that option).
Here are a couple of tutorials that might help you:
Hope this helps!
I'm going to throw in with Joey and say you should learn enough HTML and CSS for your purposes.
The code that Fireworks produces is ugly and obtuse and would be difficult for a newbie to edit or maintain. (*I* don't want to look at it, and I have a pretty good idea of what I'm doing!)
Try this tutorial: