All credit to the author of this thread:
http://www.xbox360achievements.org/forum/showthread.php?t=20....
SLOW THE GAME SPEED TO ZERO! It makes it so you can get steals much easier. I tried everything else until I ran into this tip. I tried it out, and along with sliders and messing with BRoy's skills and reducing the Wizards dribbling skills to zero had the achievement in less than 10 minutes.