well if you havent already tried it. i would go with the battle mod. it's pretty good. i changed the mod on mine a bit to have 80 men per inf. unit 48 for cav., 4 for art. and made the infantry speed a little faster (than the battle mod version. not faster than the original speed)
There is no real order in which you should install stuff. Make sure you get the patch and d/l the latest version of mods, they are usuall labled appropriately.