Seo Ultimate extension convert to all lower case?

There probably is no longer support for this free extension. But I love this extension. However, I have a minor problem with it. When it automatically creates the URL for my products, it does not convert my title caps into lower cases. Does anyone know how I can make the url into all lower cases using this extension?

http://www.opencart.com/index.php?route ... _license=0

Thanks!

php strtolower function will do the job

Where should I put this function? And what does the code look like? Thanks!