Not sure if it's exactly what you are talking about--but I generally have 2 layers on my bottom border. Usually it's a ruffle and then a shell--or variation thereof--on top fo that. Photos are in my "photos" section.
for a nice boarder that has that layered look, you can use the triple star tip (2010 i think) just pipe it around makes a wonderful boarder with out alot of work. For more complicated boarders look to wilton encycolpiedas if you can find them
