Is it possible to Create new weapon types with Bonus vs X?

[GnaReffotsirk]

Since S2TW is based on ETW, and that is if CA didn't change the code to limit things and if it was possible in ETW/NTW, is it possible to create new weapon types that does bonus versus defense and/or armor in S2?

Furthermore, is it possible to create new armor types aside from leather and plate? Like chainmail, bronze, etc? Where such types gives penalty to say fatigue during summer, or winter, etc?

How moddable is S2TW in this area?

If not, is it possible to edit the existing weapon types and armors? I see there is pike, spear, sword, and sabre assigned as melee weapon in unit_stats_land. Where can we find these weapons? Which file in the db?