CSS hack for IE needed

Our site is not displaying correctly in IE6 and IE7. We need someone to do a quick hack on the CSS for IE. You may view the site at powervisa-dot-com in internet explorer. View the site in Firefox to see how it should look. Problems that need fixed: (1) Note how the tab menu in the header is floating above the subheader. The two should meet. See how it should look by viewing the site in Firefox. (2) Note how the header is twice the height that it should be. (3) Note how the "Service Categories" menu in the left column will jump further left out of the left column. This happens sometimes, seemingly at random. (4) Finally, note how the site displays when the window is shrunk to a smaller size. I need someone to fix the above display problems ASAP. More work may follow quick and successful completion of this project.