feelgood456

Hey I was surfing this forum and I was hoping for a little help. I am a Mac user and currently a student at Indiana University. They have a printer that can print pictures 9 by 3 feet big, one sheet at a time. I was hoping if someone knew how to stack multiple images together in a 9 by 3 ft frame so that when they print out i can cut them and have a bunch of posters. I appreciate any advice!