Setting index as default page

Hello. My name is Lee. I currently made a forum, and I would like to know, if at all possible, how I would go about setting my forum's index (example: "http://forum.forumotion.com/index.htm" ) as the default page that automatically shows when people visit my forum. For example, I want my visitors to be able to see "http://forum.forumotion.com/index.htm", but without having to type in "/index.htm" at the end of it. Is this possible? If so, please let me know how.
Thank you in advance.
Gratefully yours,
Lee

Never mind. I seem to have figured it out myself. Thanks anyways.