I've been playing ftb for a while now and started playing on a server ruinning ftba and since the server closed i took the map and started playing it in single player. I recently upgraded to the mindcrack modpack and everything is working good except for that random memoryleak bug which i dont really care about. my problem is that ive seen videos and stuf abouot randomly generated things like spider trees and wisp spawners and id like to get them in my world but its already been explored alot and i dont want to move my huge base. i tried using mc edit which i am a total noob at and it sorta worked for transfering to a new map but mc edit screwed with all the block id values so it was totaly usless. trees became watermellons and there was nothing left of the mods. is there a way to copy chunks from one world to the other without the block ids getting scrambled?