Ingame settings: What is shot control and cpu assistance?

Live 2006 doesn't quite respond to tight games like 05' did. Even if i left cpu assistance on(which i don't know exactly what it does), the cpu still doesn't really catch up all that well to my team's score to try and force a close game from happening. I know with cpu assistance on, i do miss some dunks and the cpu make some really tough outrageous shots when they are down by a big margin, but still i don't get as much overtimes and close exciting games like i used to get in 05'. I'm also not sure what shot control does, it is by default set to User. Will setting it to CPU do any good?

anybody got any ideas?