Your first step (with respect to the reply by moron) is to announce that you have achieved success and completion with the project using the Firefox browser. All those who wish to use this new interface should use this browser until further coding (and additional funding) can be implemented to accommodate non-compliant browsers. Then it's time to start hacking as davorg and the others have suggested.

Using CSS may also bring rise to problems in the future using IE. MS seems to have some version problems with that, even though they have work-arounds, it will become an ongoing task to maintain the compliance of CSS and IE browsers.