Remove Rating Function from Stars Display

Imported From: http://groups.google.com/group/in-portal-dev/browse_thread/thread/baa3432fb27d043a#

On one of my projects, we want visitors to rate an item only if they comment it.

What is the cleanest way to remove the "rating-on-hover" function? I mean something better than just removing javascript.

Other thing, when we rate an item and comment it, we have "no rate" radio button, along with standard rates ones. How can we remove this option? I had a look in php virtual files, but didn't found a solution by myself.