Trees used in Peach Project

Can somebody please explain to me how these trees were made, or how they are put together I am having a hard time figuring if ti was / is all blender, or if some plant script like ngPlant was used? I’m not sure I understand how the proxy thins works in blender.

Maybe we can do a simple model here for learning purposes? One branch with 5 leaves etc…

There’s a script in the scripts menu that does them, it’s called ‘tree from curves’. There’s a thread on it in the blender tests subforum, and there is some documentation as well, though it is not very extensive.
here’s a link to the thread in the blender tests subforum http://blenderartists.org/forum/showthread.php?t=109760