Browser optimization

We've developed a website in Drupal 6 and need help for the browser optimization and to get a floating background element implemented.

I've attached some screenshots of how the website look in Safari. This is how the other browsers should look. The attached file with the name "toftebo-frontpage-ps.jpg" is exported from Photoshop. Here you the how to floating background element should be used.

I need browser optimization for Firefox 3, Firefox 4, Opera, Chrome, IE9, IE8, IE7 and IE6. The first 6 browsers only need small fixes, IE7 need a bit more work to get some elements placed right. Rounded corners and shadow are an issues in some of the browsers. For IE6 i don't need rounded coners (only if it's very simple!?) but just need to be functional.

Since the website is developed in Drupal, I prefer that you have experience using drupal and drupal theming.

I will of course provide ftp access and access to the drupal backend.

I need you to be good at English and communication in generel. If we are satisfied with you and the result, we might use you in the future with similar projects and drupal tasks.

Thanks.