This mod adds Holy Sites for both major Muslim religions (Shia and Sunni) while also keeping the basic Muslim mystic/legalistic mechanic. This is compatible with all versions but you probably need the original Holy Sites (Coptic) DLC.
The religious powers that Muslims can get from their sites are also new.
Install:
Unzip into your Mods folder in your user profile.
Of course the mechanic was buggy because paradox developed for a paid DLC. Oy vey.
I needed to work around the limitations of pseudo-DRM as well as things that developers never realized because they made a *single* religion use this, while I needed it to work on several at the same time with different locations and bonuses. It wasn't as easy as this was suppossed to be.
Quasi-bugs:
* UI for religion tab looks a bit unprofessional.
* "Call on religious followers" and the equivalent legalistic button don't work. At least the passive buffs/debuffs do work.