Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
[TERRAIN]
LOD_RADIUS=4.500000
MESH_COMPLEXITY=75
MESH_RESOLUTION=20
TEXTURE_RESOLUTION=25
AUTOGEN_DENSITY=3
DETAIL_TEXTURE=1
WATER_EFFECTS=5
The default values are something like 4500 trees and 4000 buildings.