How do I use the conditions wizard to bypass paypal on my registration form?

I was recently sent a sample registration form to clone that said "If coupon code is equal to Code 100 Hide My Products" in order to bypass Paypal for students who have received a full scholarship for the RYW Spring 2015 registration form. How can I create this condition myself within the form rather than cloning one that already exists? I would prefer to know because all future registration forms will also have this option and as we are midway through the registration process already I don't want to have to create a new form, etc.  Thank you!