Hey guys.
Shut the forget up.
He get's it by now. Wrong loving section.
Why don't you actually help him, since that's the purpose of the thread instead of mindlessly flaming him.
On topic: All you need to do is download the .zip file, and drag the file itself into your add-ons folder.
Then in-game, when you go to start a server, click "Add-Ons" just above the server information bar.
Check off the box for the add-ons you wish to be included in your server when it starts.
Choose carefully. Once an add-on has been enabled, there's no disabling it in-game, although with the help of console you can load an add-on you didn't previously enable.