The haks basically go in alphabetical order when installing them in the mod. The Builder's Gudie has more detail.
I've only given the contents a once-over in the game (the Builder's Guide is very comprehensive, though), and while I may only use 30% or so of the content, even that is a huge amount of new stuff for my players. The only down side is that it will take a month or so to integrate all the new stuff into my campaign. Starting with my next module, though, CEP will definitely be required of all my players.