Did you get Aerox 100 rims? They are a direct fit. The Aerox 50 rear rim wont fit our BW cases.
The front rim is easy with the stock forks. You can use your stock caliper, but I recommend a Brembo. (they make the best brakes in the world) All you need to do is oval-out the mounting holes on the forks, and use a spacer between the caliper and the fork. Bolt it all down and test it out. Also, get a steel-braided brake line. I can supply that if you want...