i did this for the Growkit project wich wont be released as a Script.
i found a way to use the existing particle system to grow leafs on trees, bushes or the ground.
wich is basicly what these UV mapped planes are made for.
-Subdivided for basic curved shape.
-Pivot point set to the root.
-Packed color textures and normal maps.
-Basic cycles material setup.
You can use them for trees bushes or plants.
If you append the objekts they will be on the last layer.
a tutorial on how to use them properly will be uploaded soon.
but for now i will leave you with a download link
i did try to upload it to Blendswap
but after a many failed attemps i switched to mega.
over and out