This script gives you a way to rate your own photos. To rate a photo simply click on a star. The stars are only visible to you when you’re logged into your site. The rating is stored as a keyword for the particular picture. Therefore you can view all the pictures of a certain rating by visiting http://yourname.smugmug.com/keyword/rating4star.
Go into your settings to customize the look and feel of your site and add the following to text area for the footer.