If it’s the old wii controller (not the newer one with motion plus built in) then you should have it available as soon as it’s linked over bluetooth. You can press both the 1/2 buttons at the same time to get it to link, or worst case hit the sync button on the back. Make sure it’s listed in your bluetooth devices before starting driver4vr. You have to make sure you connect to it on a personal area network when you right click on the bluetooth icon in windows, and not add it as a traditional bluetooth device to make sure it has a firm pairing.
In my case, I really needed an external bluetooth dongle to make it work (the Asus one works well and can be found for less than $10USD) – my internal bluetooth was too erratic.
I don’t believe the newer style wii controller is working yet.