Really Bad Posture, Now What?

After reading the series of articles about neanderthal posture I have learned that the root of all my training problems is that I have really terrible posture and that I need to fix it.

In case you haven’t read the series:

http://www.T-Nation.com/free_online_article/sports_body_training_performance_repair/neanderthal_no_more_iii

http://www.T-Nation.com/free_online_article/sports_body_training_performance_repair/neanderthal_no_more_part_v

In short, I am exactly like the first case study in the 3rd article down to the word. My first question is, should I continue doing 531 and implement this program on top of it (like doing am and pm sessions) or should I stop 531 and switch to this program and continue once I’ve straighten out my posture?

Lastly, I don’t have access to any machines, so for exercises like the Low Pulley External Rotations or High-to-Low Cable Woodchops are there alternatives I can do with a dumbbell?