I need to set the layout for the site at 958px because of a header graphic. But I need the post + side bar to only be only 718px (518px for post width and 200px for sidebar width)

I have the "layout width" fixed at 958px
and I have "center column style" set to: padding: 0 120px;
which fixes the left post margin where I want it to be but I can't seem to figure out how to fix the width on the post or move the right sidebar over.

Any suggestions?

What version of Atahualpa and WP?
What si the URL?
Why? (why do you have a graphic larger than teh width of the page you want?)

Version of WP 2.9
Version of Atahualpa 3.4.4

Site: http://highaltitudemarketingacademy.com/blog

You'll see the header graphic includes a inner graphic and that's what the post/sidebar need to fit into.