103781 Bad Words Filter change

I have a script from aedating. one of the option allows member to send private messages to each other. Here is what I want - I will give you the php script which does the message creation (basically users logs on and types message and sends it) - Modify the script to do the following - a) read words from a bad_words table and if any word matches (case insensitive) then prompt a window with the message saying word (actual word) not allowed I will create the table and put some bad words to test. I have a development site where you will have limited access thanks