I finally managed to get the mod running and immediately started one of my HoMM2 favourites: Deathgate (as blue warlock)
I witnessed two things:
1. My Witch castle tavern is bugged - homm3 sprite appears in the top left corner and no tavern appears in the town to buy heroes, which is unpleasant.
2. Soon I noticed that all AIs had untrivial number of knightly troops - peasants, archers, pikemen, massive numbers of crossbowman (even upgraded) and swordsman. There was not a single knightly castle on the map. So how did AIs got those units?
I managed to win, though I have no clue what happened.