CSS help on Wordpress site

I have a website designed in Wordpress ([login to view URL]) that didn't have the columns like I wanted them, so I am trying to move things around. It looks fine in safari, but when I checked it out IE and other browsers, it looks bad. It will involve tweaking the CSS code. I can send you the original WP theme and the one I've tweaked. I've included a jpg to show you how I want the site to look. (Or you can pull it up in Safari.) It should be a relatively easy project for someone who knows CSS well.