I have both books and I'm about 2/3 of the way through Vol. 1 (reading it very carefully and studying the problems presented by Dan). I can't imagine a cliff notes version of Vol. 1 insearted into Vol. 2 that would help you get anything out of what was in Vol 1. There is just so much to learn and study in Vol. 1 you would lose out on that knowledge.

The only exception I can think of is if you are an aggressive player, since volumn one follows a conservative mindset. Even still, it will help you understand conservative players in early to mid level rounds of tournaments.