The wireless card will be automatically installed for you.. and ready to recieve a signal.
Once you enter an area with a wireless signal you'll see a balloon pop up and let you know there is a wireless signal. Click on it and it will connect for you.. As long as you dont need an ecryption key..
But just because you get the wireless card, This doesn't mean you get free internet everywhere you go. Someone has to provide this. Whether you have wireless in your home. Or you school, coffee shop or public library.
Should also add, you have to be in range of these wireless areas.