How to strtolower all query result keys

[eluser]skunkbad[/eluser]
I've been working on a project with many models, and because I am not in complete control of the database, many table fields have uppercase characters. I have been using strtolower on the keys, but would like to implement a solution that extends DB_result.php. I'm tired, so I'm just looking for a little help if anyone has the time. I'd like to ensure that I don't break anything by extending the class, because everything else needs to work the way it should. Any help is appreciated.