WiFi Network Setup
Routers should work "out of the box" without any special setup requirements. If you are using a second hand router it may be a good idea to reset the router to factory settings in order to erase any configuration parameters which have been altered from their default settings.
The router does not need to be connected to the internet in order for BridgePal to function, and will automatically allocate ip addresses to all devices that connect to it. There is no guarantee that the PC will receive the same ip address each time that it connects to the router, but this does not matter because BridgePals are automatically configured to communicate with the PC's ip address.