Thanks for all the tips. I didnt even think about tying it like that to the metal supports of the cieling. Its a great idea.

I cannot use ducttape anywhere where it will damage anything, as it is the school after all. I am considering running the duct tape along the top of the plastic and then punching holes through rather then using the metal groumet thingies. Will depend on how much groumets are and how many Ill need for the job. Im going to lay it out wiht tape on the floor to give me an idea tomorrow.

Thanks again