bekolblockage, I agree you need a sound background in met to be able to understand it all. If you merely scraped through at GFPT/PPL/CPL, study the entire subject from scratch and don't leave any bit uncovered. I have lectured this subject and you should see the reaction on some students' faces regarding things they'd previously thought they knew.
Another tip for newb737ng. Sit the 7 subjects in this order:
Nav
Aero & Systems
Perf & Loading
Flight Planning
Air Law
Met
Human Perf
This is so that you do the harder ones first, get them out of the way before the 3-year time limit runs out from the first sitting.