If my site is already made in dreamweaver..

you have a wordpress site you want to use your stuff on?

Or you just want to use the plugin?

You could convert what you’ve done to a WP theme, but you’ll need Wp to use Wp plugins

NetTuts are doing a marathon series of videos:

http://net.tutsplus.com/tutorials/site-builds/convert-a-warm-cheerful-web-design-to-html-and-css/

This is one of the best resources on the ‘Net:

http://digwp.com/

It’s also one of the key resources for me building my own theme.

You may also find this useful:

http://www.webdesignerwall.com/tutorials/building-custom-wordpress-theme/

This is a bit dated:

http://www.wpdesigner.com/2007/02/19/so-you-want-to-create-wordpress-themes-huh/

And bookmark this:

http://codex.wordpress.org/Main_Page

You’ll need to refer to it frequently.

you could also look into themedreamer

its a dreamweaver plugin

some like it, some hate it. I used it once to make a theme. I prefer just handcoding so I dropped it, but maybe you’ll like it