Instructions
Connect the networking adapter to your PS2 and cable modem. The adapter will plug into the back of the console and can be attached to the model through a standard Ethernet cord.
Start "Crash Nitro Kart." The game will load to its main menu.
Click "Multiplayer" from main menu. As long as your networking adapter is attached, you will then be able to join or create online matches to play online with other players.