I add these type of "pockets" to all quilts that I will be hanging, I do them on all four corners the top to hand and the bottom to keep it straight. Then you just add a dowl rod to each pocket and you are good to go!
http://terriesandelin.blogspot.com/2...r-project.html
Scroll to the bottom of the blog entry for the picture of the back of the quilt and see the triangles in the top two corners! I add them before machine stitching the binding on the front and then go about binding as usual!