I think OP's main issue is that the hill just isn't steep enough to gain the momentum needed to work the board. try exactly what you were doing on a steeper slope and you will get it no problem.
You are accentuating the quickness of the turns by swingin your back end around and skiding then locking in the turn. on a steeper slope the board will do all the snapping for you all you have to decide is when to transition.
The key here is to suck up your knees in the transition then push out as you compress through the turn. not full extended, just when as you lock in and feel the lateral force push to about 25% bent then suck back in to 50-75% as you make the transition. your upper body stays pretty much the same height off the snow through the whole thing.
Im not an expert either im just describing what it feels like when im riding.
2nd dude has it down pretty good i think.
Last edited by Riley212; 12-12-2011 at 04:37 PM.