Progress Update:
Sassanid governors are absurdly difficult to find. Don't worry, though; I found a few major noble houses, so worst case scenario I'm going to throw them in as governors, since they have to go in somewhere.
In other news:
Bad_Haggis: I saw your posts in the thread about overhauling the Byzantine Enpire to use Catholic succession for the duchies; have you made any progress with your plan? I pm'd the guy who was writing said mod to ask about his system, but I never got a response back. I'd like to implement a system similar to the ones discussed for the Sassanids, since their empire had a similar level of centralization, but I was wanted to know if you'd already started on the government stuff before I went ahead and started from scratch.
Still waiting to get the data recovered off my hard drive, unfortunately; might be a while longer before I find out just how much I lost in the crash. Still have my desktop to work with, thankfully.
Edit: just noticed -- SWMH update coming soon. Any idea if they're touching Persia? I've already confused myself enough trying to port history files around...