By "pairing" I mean the pairing code , each wiimote has an individual pairing code to pair it with your bluetooth reciever , it is not used on windows/doesnt do anything so just press "Skip Pairing" during the device install screen , you might also need an External Sensor Bar these can be purchased for roughly $20 US you can also use 2 candles with various candle lid type devices/things and get your infared signal from that
Hope this helps
PS: Yes your wiimote will work fine , not sure if the wii microphone/headset is supported on Dolphin/PC unfortunately though