My mom has whole cloth quilts as her closet doors in the bedroom.
She purchased them and took them in and had large grommtts put in them and then put them on a pretty rod. I'll see if I can get pictures when we get down to visit next.
This is how they hang:
http://www.bedbathandbeyond.com/prod...1&SKU=15939222
When we lived at Tahoe we had window coverings that had a light batting. We had single pane drafty windows-brrrr. I would think a cover over the door would save heating like the window blankets did.