I use this bluetooth adapter, bought it for the cronusmax. After doing some research I learned that it did not need any driver for windows 7. At first I just used my PS3 controller which worked and later my Wii U Pro Controller. So however your going about getting wiimotes to work on your PC, I do not see why it shouldn't work.
http://www.amazon.com/gp/product/B003765X38/ref=wms_ohs_product?ie=UTF8&psc=1
http://www.amazon.com/gp/product/B003765X38/ref=wms_ohs_product?ie=UTF8&psc=1