minnapple, have you informed the web host? I've been involved in copyright infringement, and wrote a LOOONG email to the web host and she took a lot of it off, she will be getting an email about the rest.
Plus, there is another site, in total, with different graphics..she will get a lovely phone call about that, followed by an email...its just straight html, no front page.
I had no results with the site owner but it is in the terms of service with web hosting not to have anything on the server in violation of copyright. I've got screenshots of everything for documentation, plus the original code in files..I never delete anything. And this is where Google cache comes in handy, I have screenshots of the whole layout with my copyright notice on it from the Google cache. Didn't even have to show it.
Sometimes a strong note to the host gets action. Now it's the second round. Depending on where it is, venue for court can be local if the work was done in the county. That's the case here in Los Angeles.