I've got my own custom config tables i need to insert a row into when my module is added to a page.

Could someone please tell me the Event i need to override?

cheers

While there is no "ModuleAdded" event to which you can subscribe, I normally handle this need in a custom Configuration class which loads/saves module and tabmodule settings and makes them available as strongly typed properties. If there are no module settings (or tabmodule settings if you need to handle the addition of module copies/shadowed modules) returned when an attempt is made to load the settings, then you can assume this is the first addition of the module to a page and perform what ever code or SQL procedures you would like. If you module does not use any module or tabmodule settings, you can create one for this specific purpose.