Does anyone know how to remove the privacy curtains from a pop-up to repair the hangers? A number of the hangers for the privacy curtain on the rear slide-out are broken. These are sewn into the curtains and slide in a track that extends the width of the trailer with no room on either side to slide them out. It looks like the track itself is what holds on the canvas over the slide-out, so I'd rather not mess with removing the track. PopupParts.com has the replacement hangers but no instructions on how go about replacing them. Thanks much.