Answer: To use Midnight Club 3 online it is necessary to have a current and valid network configuration on your memory card. Ensure the memory card is inserted and the console in use is the original console where the network configuration was created.
Start Midnight Club 3 and choose 'Network' from the main menu.
Select 'Internet Play' from the next screen.
You will now be prompted to enter a nickname, email address and password.
The email address and password details are those used to setup the account on your memory card. Nickname is how you wish to be known in the game. If no previous network configuration is available choose 'network configuration' instead of 'Internet Play' to create one. Consult your network adapter documentation regarding the creation of a network configuration file for the PS2.
If you are running through a router ensure the PS2 is available in the DMZ. Consult your router documentation for further instruction.
Ensure you are running through a Sony network adapter.
For further information on Network game setup, please see page 22 of the manual.