how to import shapes &grains from brush to library

many default brushs have brush shapes and grains, that are not listed in shape library and grain library.

Is there any way to import those existing, but not listed in library, shapes and grains to library?

or get those image files somewhere?

I've wondered the same thing. 

It's the same problem with brushes I've downloaded. If it uses a grain that doesn't come with the software, I'm out of luck and can't use that grain anywhere.

I think Escape Motions should at least load the software with all of the grains they use in the default brushes.