C.K.
Have you tried 1-2 -3 magic? It works with all kids, if used correctly. You can get a copy at the library. They also have it on video tape, which I found to be more helpful in terms of seeing it used effectively. The video is actually very watchable.
I have a 7 yr old girl, and a 4 yr old boy. When I use it consistently I never go past 2. And I will say we have tried other things with him because he is so difficult and it is the only thing that has worked, without threats and yelling.
1-2-3 magic, Thomas W Phelan
He has a website:
http://www.parentmagic.com/
Hope this helps,
C.