I've divided the map into 15 pieces. These pieces each has the size of a normal paper which you use for your printer etc. Just download them all, print 'em out and glue them together and you'll have a nice, big map of Middle-Earth to nail to your wall. =)
(PS. Just discovered that I've accidentely left out a stripe of the right edge... you can get it here but you'll have to do some work on your own... sorry!)