I would like to make a modmod of VP. I will be focusing on modifying the techs in the ancient era based on an existing mod. I will need to override some of the definitions in VP such as when resources become visible and which techs are depended on which, etc. I dont see a need to modify the DLL as I will simply be adding new techs / buildings and modifying existing techs and their dependencies. Whats the best way to do this?