Installing your own php server w/Apachi tutorial

in page 2 of the tutorial i came accross:Lets do a quick-edit to the config file. Open up C:\web\conf\httpd.conf and search “LISTEN 80”. Replace that with “LISTEN localhost:80” so it will focus the connection on port 80 (web-browser default) only for you. Now that’s dedicated!

Next, search “localhost” until you find “ServerName localhost:80”. Make sure it is set so, because without our pointer ‘localhost’ the website cannot be accessed.
well, I could not find LISTEN80. What am I doing wrong? I use windows xp.
Thanks alot.