Basically what you have to do is prepare metally for the transition and adjust physically. I like that for practice as it works well. Some people shy away from drifting in the wet or a partially wet track but its something once you get it down you will be good. You have to adjust angle and throttle.
Here is a old video of me doing just that with my old fat ass r33 skyline.
http://www.youtube.com/watch?v=KhsRXeDt0rY