CSS/PHP redesign help needed

Hello, I have a website that is about 90% completed. It is a video/image sharing type website and most of the functionality is done. There is still some more work to be done, mostly some design adjustments and fixes needed to make the site cross-browser and platform compatible (safari, FireFox, IE) (mac, pc). There maybe some minor php work needed as well, so knowledge in MySQL, PHP, and CSS is a must. I'm also looking for somebody who is available immediately and can commit 30-40 hours a week. I don't expect the workload to exceed 40-60 hours. Thanks! Moose