If I remember right d4 objects are stored in Kalonline\map\lib
I replaced d03_obj_26.gb, d03_obj_38.gb and d03_obj_11.gb with one of the small 1kb object files for d4f4.
07/19/2017 19:45Wittytou#3
Game should crash/close if you just delete the files.
Copy that number 12 three times and rename copies to 26, 38 and 11. That big weird tree should become a small stone now.