Adding models to AEC Foliage or a plugin that stores textured models like the Foliage menu.

Hi there,
I have been a long time user of 3D Max and I always wondered if there was a way to add more trees, grass, plants to the Foliage pannel.

I love the fact that it uses images to pick from and that it is more or less click and drop. Is there a way to do this, or is there a plugin/script that I can use to create new textured objects and store them forever in 3D Max

I came across this that I found interesting, but it would be far more interesting if the textures were already applied.

If anyone has seen something like this or knows how to make a plugin/script that does this, i would love to hear about it.