Pathfinder RPG

[Mathias]

I can't help with #1, but for #2, would it work to code a trait or an adjustment for each of the factions?

First, go to the User Tags field at the bottom, and add the PFFaction tag
Add an eval script (the timing doesn't really matter for this, so UserFirst, 100 will work) of:

perform hero.assign[User.PFFaction]

then, create a pre-requisite of:

if (tagcount[User.PFFaction] <= 1) then
@valid = 1
endif

And give that a descriptive error message.

That means that if more than one PFFaction tag shows up on the hero, each of the items with that pre-requisite will show up as an error. (This is a simple script that won't grey out the other faction items - I know there's a way to check whether an item has been added yet or not. If you want to try some more advanced programming, you can add a second part to the pre-req script that requires 0 PFFaction tags if the current item isn't added).