Pappa;
If you have access to both, Keith offers a detailed explaination in Chapter V (pages 34-35) of the Twist of the Wrist Vol. I. and in Section 1; Chapter 2 (pg.7) in Twist of the Wrist Vol. II. Your question has many parts to its answer and taken as a whole you should get a better understanding of how to approach and exit a corner. If not, then come back and we'll try again.
Mika