If you want to have a more structured rush you might want to look at some other schools with structured rush and e-mail the campus IFC and your chapters there. Arkansas, South Carolina, Georgia Southern, and TCU are four that come to mind with structured rush.
Arkansas IFC Recruitment:
http://uagreeks.uark.edu/1395.htm
South Carolina IFC Recruitment:
http://www.sa.sc.edu/greeklife/recruitment.htm
GSU IFC Recruitment:
http://students.georgiasouthern.edu/..._IFC_sched.htm
TCU IFC Recruitment:
http://www.greeks.tcu.edu/ifc_recruitment-2.asp