How do you configuer your Nintendo DS wi-fi setings?

First, you turn on a WiFi Compatible Game. After that, you try to look for a "Multiplayer" or "Nintendo WiFi Connection" button (I would tell you exactly, but every game has a different layout). Then, try to look for a "WiFi Settings" button. After you click on that, you will be brought to an area where you can modify up to three WiFi Settings.