Right, I'll just tell you what I done...
i)Double click in the middle of the cell in which you want to place the forest section.
ii)I used the les_ctverec.p3d under the Data3D folder.
iii)Click O.K.
iv)Set forest flags for each cell that a forest section is on.
To do this select the flags TAB, then make sure your in expert mode. Select the cells with forest pieces on them and then select under the section title Forest, then tick forst in the value heading.
iv)Use the pl.paa texture (if using .eden textures) along with the appropraite combination of blending textures...(you know what I mean...)
I think that it...
Hope it helps,
Waterman.