I think the most essential part of tuning an AWD drift car is the differential. Spend lots of time there, because a poorly tuned differential can literally make it impossible to drift. A good example to learn from is the stock Evo VII prototype, if I remember correctly. Also, keep the springrates high (to prevent weight transfer since it's AWD). That way you are pretty much using throttle and brakes to steer the car. In an ideal AWD drifter, you never need to use the steering wheel except to initiate drifts, the rest of the time it is straight-forward. Unless you screw up of course, which I dunno about you guys, but I do often... then you need to correct a little with the steering wheel, but the point is that it should be possible to do it with very little use of the wheel.