I'm sure Stan will reply, I'll give a bit of my own experience. I grappled with this too, trying to figure out how to make the sweeps consistent. Finally I just bit the bullet and started practicing with just the fundamentals.
I kept it simple by taking the first two shots from the dvd (28-38 and 10-5) and shot them each 50-100 times in a row. Pay close attention to how you sweep into CCB. Find the sweep that sends the ball straight to the pocket. Shoot them over and over. Then do it again the following session. Shoot until the sweeps are completely automatic. It can take days to weeks, just keep at it until it clicks. Do this first thing at each session.
These two shots teach you the basic sweeps: left and right. Once you have this, the sweeps are identical on all shots. You just apply them to different visuals. The repetition gains you the muscle memory to make it automated. No different than attaining a solid stroke through repetition, you attain consistent sweeps through a similar process. [BONUS: if your stroke is not yet consistent, this exercise will also improve your stroke consistency, which is imperative for any aiming system!] I used these two shots as my foundation to learning the sweeps. Once it comes, you'll know it. The rest of the shots get easier quickly.
Stan also gives some solid additional information in a video here:
http://www.youtube.com/watch?v=2KwI_62Npos