We've been using Forest Pack for a little while now but the tree's we tend to use lack transparency. They are too solid giving a solid unnatural look.
Common tree 5 for example.
I've instanced the material from the forest pack UI into the material browser attempting to edit the material by throwing a transparency map in there, but it doesn't seem to be changing anything! I've managed to place a leaf bitmap on to the leaves where previously lay a ForestColour map and this now shows in my test renders, so my changes to the material are having some effect on the outcome - just not the translucency map!
Also, when placing a new leaf texture in the diffuse slot, is there anyway to map this correctly? I've found placing a UVW map onto the Forrest object using face mapping helps, but I'm not too sure how you map both the leaves and trunk/branches independently. Face mapping the entire tree object of course alters the mapping of the bark material.
Any help here would be greatly appreciated!

(I should add we are using ForestPack Pro 4.3.7)