The goal is to introduce new ground element (GE) type, create OB(TOE) which is using new GE , create new scenario with unit which would utilize new GE/OB(TOE).
Let’s take something big - Pz.Kpfw VIII aka Maus and make it available in the game [8D]
http://en.wikipedia.org/wiki/Panzer_VIII_Maus
1.Since we going to alter generic data (the data which is common across all scenarios and is loaded when new scenario is loading in the game or in editor), the good idea would be to make a backup:

Edit: City data is not generic and stored in scenario file. No need to copy wrcity.dat.

















