Affiliate Site Update

My site is www.casinositesguide.com. I am in need of a site over haul. I like the general layout, colors and content but things just don't seem to line up correctly plus when the site is opened in Firefox the tables are all messed up. So what I am asking for is some expert fixes from one of you designers and possibly a header redesign if necessary. If I can get the home page redesigned to my liking then we can handle the rest of the site pages.