Depend what you want to change/edit..
Most value are in 4b, money both base currency and investment (Pron), invest house max value can be easily changed to (once in kingdom mode, this allowing for selecting "all the good" options (not sure about the interest of the one with gratuity for nobles, guess I'll know later if it they try to do something (with help from most of the others powers of the city, I would like to see them try, even Mercenary are totally under control).
Of course, for RPGMaker, use v x2+1 (v being used value(s)).