AirTime running in a different subdirectory

I have AirTime and Wordpress installed on a test server at our college campus.
Currently, when I type the URL to our radio station, the AirTime login appears.

What I would like to do is the following:

1. Have the Wordpress blog appear when a visitor enters the domain name of our website.
2. Access the AirTime login like this --> http://mysite.edu/airtime

We originally installed AirTime this past December and upgraded to the latest version this month using the "minimal-installation" instructions on FlossManuals.  Wordpress is installed under /var/www/.

I would appreciate any detailed instructions for how to accomplish this.