I was looking into the issue you are experiencing and had some tips on keeping the MacBook Pro from overheating. It is called Mac notebooks: Operating temperature found here http://support.apple.com/kb/HT1778
It is a good idea to start at the top of the article and run through the steps one by one, but this one in particular is what I wanted to point out:
Set up your notebook on a stable work surface that allows for adequate air circulation under and around the computer. Do not operate your notebook on a pillow or other soft material, as the material can block the airflow vents. Never place anything over the keyboard when operating the computer. Never push objects into the ventilation openings.