Features:
Brand new trees
Great for forest varieties.
Custom models and textures
Not excessively system-intensive.


Installation guide:

Go to your Crysis game folder -> Electronic Arts -> Crytek -> Crysis -> Game.
Open the downloaded file
Copy the zz_*.pak or z_*.pak file the downloaded folder contains into the current game folder (Game).

NOTE:If you use modified object files, scripts or textures the cheatprotection won't let you play.