Hey Meredith! I'm at Tri Delta at UTA (in Arlington, Texas). Every school is different about there application process, so if I were you, I'd contact Panhellenic at SMU. Go to
www.smu.edu and look for campus life or greek life or something... there should be a contact in there somewhere for someone for you to contact. They will be able to help you more than anyone else.... hope that helps!
Good Luck!