Fireworks and Center Align in Browser

I’m fairly new to using Fireworks CS4. Normally I use Dreamweaver for website design but I wanted to give Fireworks a try. I’m developing a website with Fireworks and I want it to be center aligned in the browser at all times. How do I do that with Fireworks? When I design with Dreamweaver I just use absolute positioning so everything stays in the same spot. I want to try something different. I’m sure you guys know what I’m talking about but if not www.aol.com has what I’m talking about. If you make the browser smaller or larger the site itself stays in the center.

Any help would be great.

Thanks for reading.

Liz