Hes Guys, maybe a little bit late for a response, but I couldn't resist as we produce the motors for the new BMW eletrical power steering system.
As far as I know, there's way more than just plug in a motor and it will work. My colleague who developped the motor and brought it into series got grey hairs from it and he didn't even install it into a car himself !
There's a lot of safety stuff to be aware of when messing with this kind of stuff.
But if somebody is really interested in doing it, I may be able to help.
Elvis