Scripts were often downloaded from sites such as Tech Gear007.
Gate Keeper is a SASL authentication type and is used by the MSN Chat control as a means of Authentication between the MSN Chat Control and the Server.
The second change was the major part, allowing the Chat Control to bridge the connections between the Client and MSN Chat Service.
The most popular third-party applications were m IRC, IRC Dominator and Viperbot.
Gate Keeper Passport is the same system, But uses parameters supplied by the HTML webpage to log you into a personal account.