In the "lists" menu you can load any description for your rating categories, including of course "3 stars superior".

This can be displayed in your pages using the field "ratingdes" of any product object, for example in the search results:

%-product.ratingdes-%

In the standard templates rating is displayed using an image containing one or more stars. This image is located through this dynamic url:

images/elements/stars<%SNIPPET ratingstars %-product.ratingdes-% />.gif

the snippet will figure out the number of stars by counting the "*" symbols in the rating description (%-product.ratingdes-%) which will produce run-time something like:

images/elements/stars4.gif

If you wish to differentiate the images used for "3 stars superior" from "* * *" you will have to change the way the image url is created by using the code of the rating category instead of the snippet, the code is stored in %-product.ratingcode-%:

images/elements/stars%-product.ratingcode-%.gif

which will produce run-time something like:

images/elements/starsOVHJ87ZTUYO.gif

All you have to do now is creating these new images for each rating. Please note you can easily find these codes in the "rating" lists unless you find more convenient to get it from the page's HTML code.