Adding local external app

[eluser]jrock2004[/eluser]
I am sorry that I could not think of a better post title. I just started using ci and I love it. On my site I have an update folder that holds a totally different site. How would I do this? htaccess file? I want the user to go to domain.com/update. On old site it would come up, but with ci I am getting an error cause it is thinking that update is a controller. Thanks.