To get rid of the wrinkles from the packing of the curtains one must run them on a very low heat with some damp towels in the dryer.  Well it didn't work, so I tried a fabric steamer, that did a better job, but I still had some pronounced creases.  So I dampened the curtains and used a just warm iron to press out the creases, that eliminated 80 percent of the creases, but one can still see the creases once the curtains are hung.  I doubt that there is a sure fire method of removing the packing creases.