Crack the motor open, hope it has 6 clear phase wires twisted into 3 pairs, and label/pull them out of the hub. Find a big 3PDT contractor, and wire it up with some guessing and the help of other conversions on here. Doc has a diagram of how his was wired up somewhere...http://www.endless-sphere.com/forums/vi ... f=2&t=9215
I would imagine its going to be made similar to most every other hub motor, so it might just be a simple matter of copying what other people have done and documented. However, this has never been done on this motor, so its going to be a bit of a learning process. Take some detailed pictures of the windings?
I'm a fan of the educated guess and check method. Sometimes it makes things blow up, but it usually ends up working. You can analyze why it worked after its working.
I'd want as much super low Z/ESR capacitance on the FET power rail as you can get to help manage the switching delay.