Quick Add, or UI Library for custom BMML

We can import BMML from MockupsToGo but it looks like we need to manually open the files to use these components. Is there a preferred directory where we can put BMML files, or some other mechanism, to allow the Quick Add to include all available BMML definitions so that we can find/import them quickly? What about adding our own BMML components to the UI Library at the top of the interface? Thanks