M.B.
We just made a bunch of korker bows at my daughter's baby shower.... the instructions we had said to wrap the ribbon (grosgrain works best with this method), secure it with clothespins, and bake it in a 275 degree oven for 25 minutes..... it works!
No fabric stiffener, no starch.....
http://www.theribbonretreat.com/custom/modules/FreeProjec...
We made up a bunch of the korkers, and people assembled them as they wanted. So much fun!