Did I forget I had a community and tons of brushes to post? Oops :)
The previews are full sized and complete, and can be used like image packs. One way is to save the preview [right click/save image as] to work with later, or you can copy it, paste into your program, and create the brushes from it :) Credit isn't required but it makes my heart smile... credit stargarden_, since spiralling is friends only :)