Ok, another silly one.
>I have my cart set to 800 pixels wide

--When I upload an 800 pixel table and bg image, it seems to fit, but for some reason, the center table gets pushed out to the right?
--For some reason there is also a big gap between the main body and the footer?

I think Im missing the obvious. Tired eyes.

Thanks for all the help.

I assume you're talking about the green table in the footer of your cart. It is currently set to 740 pixels instead of 800 pixels, but if you change that width to 100% it should take care of the width. As far as the spacing, that is derived from this line of the CSS file:

default.css (line 57)

td.page-footer-content {
border-top:1px solid #CCCCCC;
padding:10px 5px 0pt;
text-align:center;
}

... change the bolded area to padding: 0;

Hey AndyT...I reset it to 740 just so it wasnt killing my table up top.
I guess I need to spend more time with the css file!
Thank you so much for the help.