I use Greg Norman's "The Secret" all the time. I wouldn't have thought it would help with casting but after using it, I think that you might be surprised.

By keeping the wrist cupped (the essence of Greg Willis's right hand drill) it kind of encourages you to start the swing with the LATERAL movement (not rotational, aka spinning out) of the hips. And after you have made a few of these swings you will be amazed at what this kind of swing feels like.

Chessbum...