Check out this Site (link inside), have some questions

Here is the Link:

http://www.rimnordic.com/test.html

The main page is at http://www.rimnordic.com

Obviously I am trying to center the page. I think I have gotten the hard part out of the way (I think). I am using Dreamweaver, and what I need to know is how to do:

1.) How do I keep the middle table CENTERED, with a auto-fixed width on each side, so the page is always centered with the lighter blue background on the sides, regardless of monitor size?

2.) How do I add graphics on the border of the table so instead of just a square outline, it has graphics around it to smooth the transition from the page to the background, like a border for example?

3.) Last question: How do I keep the layers INSIDE the table. I have to manually move them and line them up myself. I would like the layers to think that the middle of the page IS the outline, and there is nothing outside of it, just simply a background…if that makes any sense…

Anyways, thanks for the help

-Joe