It's a good start to study the ATPw that we do for the FAA. But, it won't be enough for the CX interview. Personally, I think the FAA ATPw is a joke. The JAA ATP is more like what they have in mind when they tell you to study for ATPL theory. If I were you, I'd also study Handling the Big Jets, Aerodynamics for Naval Aviators, Ace the Technical Pilot Interview, and know as much as you can about the company and HK. Get a hold of "The Gouge". PPRUNE also has good info. Good luck.