Heroes of Might and Magic II Gold Edition: Mods, programming activities.

I always wanted to slightly tweak the balance in Heroes 2, but not too much. Just a little boost to the damage and attack of Paladins and Phoenixes, and to the HP of Cyclops, but after playing the third game, I realized I missed other things. 1) The ability to place heroes in castles. 2) Tents for buying and selling artifacts. 3) A "Market of Time" like in WoG, so you can selectively forget secondary skills. 4) The ability to edit the behavior of neutral monsters in the map editor, like in the third game (set a group of Black Dragons on a path to "never join" and "never flee" and fight them however you want :smile08:). Otherwise, Diplomacy becomes an overpowered weapon. 5) A third slot for artifacts.:D Is it possible to implement all of this?