I hadn't noticed this before, but looks like your table is 760px wide. If you cut out margins, and somehow bring that down to 750px you should be okay.
If you use this in your header you can define the pixel dimensions of margins:
<style type="text/css">
<!--
body {
margin-left: 0px;
margin-top: 0px;
margin-right: 0px;
margin-bottom: 0px;
}
-->
</style>
As for over used content, Robert warned ya.
