I would like to do a number from Shrek.

I am in the process for putting together Convocation for the school district I work at. Convocation is basically a pep rally to get the employees of the district excited about the new year. Our theme this year is "Our Story." We would like to open the show with "This is Our Story" from Shrek the Musical. No one from outside the district attends this. It is only for employees, which we have about 1,200. What is the process of getting the right to this song? I am not sure where to start and thought I could have someone point me in the right direction. Thanks.