I dont think anyone here might have even heard of EUIV, but made a mod that adds the Kingdom and religion to the game, along with other things like flavor events and culture.
http://steamcommunity.com/sharedfiles/filedetails/?id=765980383

I have plans to add more events and some decisions at some point.

Haha that's pretty cool!

What rules did ya put in?

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- There are several events so that the monarch and heir are always Female and a member of the Khura'in family
- Several Flavor events
- Khura'inese religion and culture


-The unique flavor for the nation is as follows

Ideas
Role of Women - 50% more chance of Female advisors
Lady Kee'ra - can recruit Female Generals
Decedents of the Holy Mother - + .5 legitimacy a year
Edge of the Far East - + .5 attrition of hostile forces & 25% fort defense
Spirit Channeling - +1 Diplomatic Reputation
Devout Kingdom - +1 Tolerance of True Faith & 10% Religious Unity
Isolated but Important - +1 Prestige yearly

Traditions & Ambitions
Tradition - +1 Missionary & 25% additional chance of new heir
Ambition - 15% Tax modifier & +1 additional leader