I would like to mod the names of my characters. I used to do the same thing in RTW (Because I like double names [eg Maximus Aurelius instead of just Maximus etc] by tweaking the "names.txt" in imperial campaign folder. I haven't found something like this in M2TW.
And another thing: I thing that (after the have-a-nice-Easter patch) it would be possible to give titles etc by editing the anchillaries system (FATW did it just fine) even make it seen. Another way I have been thinking to make it happen, is to mod the genealogy tree in order for it to have more giveable titles than king-prince.