I'll try to give answers to the best of my experience. Maybe I can get Chris to sanity check my responses.
Yes, it is easy to add new classes, PrCs, feats, skills, etc and to modify the ones in the core. CS provides a gui for it all! The easiest way to add them is to use the core rules stuff in CS as an example. The very same way the CS folks built the classes, races, feats, skills etc. is using the same easy gui they give you to do it. No mucking around under the hood. I put in Monte's ranger too. I just went down the original ranger inputs and changed them to match Monte's.
This entire "builder system" also makes it easy to add house rules wholesale or as just mods to existing core rules.
Searching NPC lists I am not sure about. I think you can search on the NPCs but I have added so few so far that I have not needed that. Maybe Chris can answer.
It seems like what you are looking for is a utility to build/modify your rules system. CS is the best I have seen so far for that. As a reference I have used Hero Forge (great excel sheet for core rules characters) PCGen (best COMPREHENSIVE character generator I've found), etools (found it lacking), RPM (neat, but I don't use the at-the-table features so it was overkill), and a few others that I can't remember.
CS gives me a good character builder integrated with the rest of the campaign tools and it is all customizable!
Mike
Yes, it is easy to add new classes, PrCs, feats, skills, etc and to modify the ones in the core. CS provides a gui for it all! The easiest way to add them is to use the core rules stuff in CS as an example. The very same way the CS folks built the classes, races, feats, skills etc. is using the same easy gui they give you to do it. No mucking around under the hood. I put in Monte's ranger too. I just went down the original ranger inputs and changed them to match Monte's.
This entire "builder system" also makes it easy to add house rules wholesale or as just mods to existing core rules.
Searching NPC lists I am not sure about. I think you can search on the NPCs but I have added so few so far that I have not needed that. Maybe Chris can answer.
It seems like what you are looking for is a utility to build/modify your rules system. CS is the best I have seen so far for that. As a reference I have used Hero Forge (great excel sheet for core rules characters) PCGen (best COMPREHENSIVE character generator I've found), etools (found it lacking), RPM (neat, but I don't use the at-the-table features so it was overkill), and a few others that I can't remember.
CS gives me a good character builder integrated with the rest of the campaign tools and it is all customizable!
Mike