We have a server that is running the Direwolf20 modpack from Feed the Beast. When the server was started we decided to remove GregTech from the modpack. Well now we want to add GregTech back. The problem is because the map is active we don't want to redo everything to get all of the new ores from the mod.
Is there a way to regenerate the map without nuking the world we created?
I have seen people talk about things like MCedit and World Edit but I am looking to make changes to the world (buildings, entities, towns, etc.) per se, just populate new ores in existing chunks (and new chunks of course).
What is the best recourse to this problem?