How do we use and/or modify NPCs from the Gamemastery Guide?

[mindxing]

I purchased the Gamemastery Guide content and now I'd like to create a new NPC based off of one of the NPCs listed in that guide. In particular, I want to create a Tomb Raider NPC and then modify it.

I've tried creating a new "Detailed Monster or NPC Using Gamemastery Guide". What I get is a completely blank character. When I try to pick the Ancestry, the only option is "Custom NPC".

This is exactly the same behavior I saw before I purchased the Gamemastery Guide so as far as I can tell, I didn't get any benefit by purchasing that content.

Is what I'm trying to do possible? If so, how do I do it?

On a similar note, I also want to create NPCs that are not one of the player character ancestries. For example, I want to create a ratfolk rogue, a tiefling adept, and a dhampir wizard. How can I do this in HLO?