No idea but it would be nice to somehow speed up the tech tree a bit, like you could jump into Japan like around 1575 instead of 1545 and have more access to tech stuff like the various hero units. By the time I get to unlock one I've always won the campaign, either that or when I finally unlock it in the tech tree I'm so far into Realm Divide that I don't have any funds to spare to build the requisite building or hire the hero unit in the first place. --- http://img651.imageshack.us/img651/3306/ss8121.jpg
There are a few mods from twcenter that allow you to research instantly. It would be a cheat except your opponents get the same benefit. Apparently they say it's not possible to do this only for the player or isolate any particular clan to give the effect to.
I have a mod that basically halves the time it takes for research to take place, it makes the game much harder because you end up with enemy armies running around with naginata and katana samurai very early on.