A creative designer at the Project Runway competition in Novi at the American Sewing Expo in 2008 purchased my Italian trim in Black and created this great fluffy piping. I kick myself for not recalling her name (write to me if you are her - VERY tall)and for forgetting to include it my newest DVD:
Londa's Refined Embellishments for Creative Clothing. Here is the Italian Trim as you start with it (on the left) and how it ends up (on the right.)

Simply (keeping in those controlling chain stitches!!!), fold it in half and stitch along the edge like this:

Now you have piping that you an insert - just like any piping...giving you this look as an insertion...

Or this look as a piping on an edge....