Can someone give me a crash course in setting up the LSD.

I know what a LSD does in real terms. (A limited Slip Diff), but what is the best way to set it up for the races.

I know by setting up the acceleration part of it witha *high setting you will not go sideways as often in trying to power out of corners....

....but what is the relevance of the decelleration setting and the other part.??