Thanks Strainer, well done,
No, what you've done is correct: the CoreRPG LPak is designed to be loaded with the CoC LPak (it cuts down on duplication of effort and also leads to less chance of conflicting mistakes).
I'm working on a way to automatically load parent-Ruleset LPaks when required - in the same way that the parent-Ruleset is loaded automatically - for the moment, however, simply load both LPaks.
Cheers