How I do it is I put the prairie points on with the binding. From the top of the quilt, lay your prairie points on facing the middle. Then put your binding on as you normally would. When you flip the binding to the back, the prairie points will roll over so they are facing outward like they are supposed to be. Then hand stitch the binding down on the back, the way you would do any other quilt. Maybe this will help you visualize.
http://www.youtube.com/watch?v=lPe2tBLdmac