I have read your project description, and i basically understand what you need. I'm skilled webdeveloper and webmaster with strong knowledge of Drupal (and all technologies used by it), so i can easily get this job done. I would appreciate if you could give me more detailed information, how the rating script should work, so i can be sure we are on the same page. Also if you have any question, don't hesitate to contact me by private message. I'm looking forward to our cooperation.