Why do you want to start from scratch, iamx?

I'd suggest that you use pre-made forum scripts like phpBB or if you want to get fancy you can use vBulletin.

Why to use pre-made forum scripts?

1) Community. If you have any questions about the code you can always get help from experienced coders that are always willing to help.

2) Flexibility. You can find tons of great plugins and themes. You don't need to code everything yourself (there is a LOT of work in forum coding, trust me)

3) Outsourcing. Want to have some rapid changes on your forum? That's great, hire a programmer to do all the work for you. Hmm, but programmer will take more just because you are using a custom script and he is not familliar with this environment.

I really recommend you to think twice before making the final decision!

Fireworks is used primarily to help with the design aspects of things, not necessarily the programming portion. You would still need to develop the back-end with Dreamweaver or another method.

Neither Dreamweaver or Fireworks are very useful for this type of thing, eg. Forum, CMS....

Those types of projects require high level programming skills and usually a team. And they will all be programming by hand in a text editor or with an IDE, not visual based software.

It also requires a ton of time just to get something as powerful as a forum even close to a secure and release state.

Your best bet is to do like mentioned earlier and mod an existing forum software to do what you want. Again, this requires programming skills (not Dreamweaver or Fireworks), granted Dreamweaver does have a code view, but still not the best tool for the job.

This is a perfect example of the type of opt-in forum I NEED... >> Health Covers

Forum != form.

I don't recall input fields being available within fireworks. But I haven't used fireworks in a few years, so maybe things have chanced since the version I was last familiar with.

But if you want some rough HTML
<form name="form" action="where_you_want_to_process_data.php" method="POST">
<label>First name:</label><input type="text" name="fname" value="" />
<input type="submit" value="submit" />
</form>

This should at least get you started. But if you already have dreamweaver, why can you just export the html from fireworks and just build the form in dreamweaver. It would actually be able to layout the form better, since it behaves more like a browser when in the wysiwyg mode, so you can tell if your design is spot on or not.

Oh and here's a related post:
Adobe Forums: Can I make a 'Contact Form' in...

I guess it's not possible within fireworks - you have to export it to Dreamweaver in order to create the actual form.