Cant figure out how to switch Religion... HELP

[Molferen]

Hello, i have been trying to figure out how i can change my religion for 12 hours (literally).. I am a HUGE fan of Game of Thrones and i am also LOVING this mod for Mount & Blade.
I want to switch religion to R'hllor so i can get the Volantis Recruits but i am unable to find the "Septry" to do that.. It's starting to get on my nerves because i am getting tired of the Nothern Recruits and i want to try something new.. I have been playing for almost 400 in-game days and i dont want to start a new game just to change my religion.
PLEASE help me pin-point the location of the Septry for R'hllor... 

> BTW there is a bug when you send your recruiter to buy troops.. He just get's stuck and wont move, that's also a part of the reason why i cant get Volantis Soldier's otherwise i would've done that instead of changing religion.

[Realize]

Go to the Dragonstone and talk to R'hllor Follower. He'll switch your religion immediately.

[Molferen]

So that is in the Lords Hall? I'm currently at war with King Stannis Baratheon and im at -100 so it's gonna be hard to come back from..

EDIT: Can i conquer the Castle and will he then still be there?

[Tages Grey]

Yes, you can conquer the castle and they will still be there.

[Molferen]

THANK YOU SO MUCH FOR THE REPLY!
So very much appreciated!