Instructions
Press the "Home" button on any working Wii Remote.
Point your Wii Remote at the bottom of the screen to highlight the "Wii Remote Settings" option. Press the "A" button to select it.
Point your Wii Remote at the "Reconnect" button and press the "A" button to select it. The lights on your Wii Remote will flash.
Press the "1" and "2" buttons, at the same time, on the remote that you want to make number one. Hold the buttons down until you hear a tone and the leftmost light on the bottom of your remote becomes lit. This Wii Remote is now number one.
Press the "1" and "2" buttons on the other remotes, one by one, to reconnect them to the Wii system.