Welcome to WebmasterWorld Guest from 220.127.116.11
I'm using a Mac right now so I can't verify this procedure, but look for the hosts in your Systems folder. Make a backup copy before monkeying with it. The hosts file acts a first line DNS router, that is the browser will look for the IP address here first. So, on a single line put the shortcut (space) and the IP. Just copy the localhost 127.0.0.1 layout (with the appropriate IP address of course).
For more info search for "hosts file" at your neighbourhood SE.