I have the RS6 also, but its AWD and I only drift RWD, like your supposed to.
Rufusgonepunk: You must be into drifting irl. I can tell by the cars you use.
You choose the cooler japanese cars to drift. FD, FC, jzx100 chaser, aristo, soarer...basically anything but the stereotypical top 3: corolla, silvia, 180sx