Just a quickie.
The rules say:
"Custom NPCs are for RP purposes only, and will not be able to carry out NPC type specific work."
Does this mean specific work like building, piloting, etc ... Or does it mean that they will do nothing?
For example will they still fight if the party is attacked? Save me if I get knocked out, etc ...
Don't fight when you can talk ...
Don't talk when you can nod ...
... And don't nod unless you absolutley have to.