I visited your test site. There isn't a ring. Without the ring, I can't really help as much.
What I would try:
Slice it into 3 sections:
The logo, The Header, and the footer with the rings.
Then put the logo in a div, the header in an other div, the content in a third, then your footer in the last.
CSS them so:
#logo,#header,#content,#footer{
width:750;
margin-left:auto;
margin-right:auto;
}
This will create what is known in the internet marketing world as a "Squeeze Page," though that's what it looks like you want...
Here, since I've nothing to do, I'll make an example page for you:
HTML Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html>
<head>
<title>Site Title Here</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type="text/css">
body {
background-color: #692e02;
background-image: url(images/bg.gif);
background-repeat: repeat-x;
background-position: center top;
}
#content{
padding: 0px 15px 0pt 15px;
background-image:url(images/navbg.gif);
}
#content br{
line-height: 5px;
}
.layout{
width: 750px;
margin: 0 auto 0 auto;
}
</style>
</head>
<body>
<!--Put the divs for images in a class called layout for later CSS reference-->
<div class="layout"><img id="logoImg" src="http://www.webmaster-talk.com/images/logohead.jpg" width="750" height="121" alt="" name="logoImg"></div>
<div class="layout"><img id="headerImg" src="http://www.webmaster-talk.com/images/header.jpg" width="750" height="276" alt="" name="headerImg"></div>
<div id="content">
<p><br>
Your Content Here.</p>
</div>
<div class="layout"><img id="footerImg" src="http://www.webmaster-talk.com/images/footer.jpg" width="750" height="71" alt="" name="footerImg"></div>
</body>
</html>
Assuming I got everything right, that should work.
The rings would stick out on the left side, so make the footer stick out by the same amount on the other side, and it will stay centered, and look good!
I used mostly your CSS and HTML, but I converted your tables to Divs, because Divs are more extensible in my opinion. (and because it will allow you to put the rings)
The page passes W3C Validation, and should work on your website unless I made a typo!
Well Merry Christmas, and Good Luck!