Very good mod (even in beta), here's some bug-feedback:

The mercenary_goguryo_cavalry fails to load for manual battle and causes CTD, but the goguryo_cavalry do not.
I've tested all choson units and mercenaries with various rebels and japanese armies, but it does only occur when the mercenary_goguryo_cavalry took part in the battle.

I can confirm a CTD by clicking on most of the Yomi cities while playing as an opposing faction.
However this CTD seems not to happen on the newer conquered cities and it neither happen while playing Yomi in an early stadium, so I suggest its one/some of the later Yomi buildings.

The choson scouts seems to stand on their horses if watched from a middle camera distance.

Quote Originally Posted by Epistolary Richard
Sorry, the modding community is closed for a while - we've all been waiting for this one!
Now you've played a couple of days. Shoo shoo - go back to work modders, we're waiting on YOUR great stuff also.

@ uksiu:
If you experience real problems with the menu, I would recommend to start the game with an " -nm" (without the " of course) added to the target path of your desktop symbol, you will have no intro movies and the background is the one from vanilla rome.
The negative effect would be the loss of this awesome background.