OK he is the Island map.
Save your Island map first.
It is located in the following folder
C:\Program Files\Electronic Arts\Crytek\Crysis\Game\Levels\Island
Download and replace the Island.cry in the folder.
If you do not have that folder.You must unzip the gamedata.pak folder first.
I have changed maybe 10,000 trees.I left some orginal trees and I put in a tod file,Have fun