Can I edit the "Enter Coupon" copy on a PO form to have a different label?

See screenshot at http://www.evernote.com/shard/s207/sh/42542347-1f1b-4df4-8f60-9ba70f27d222/613f293caaa9c316dce67e184f1a960b

I think you can do this by going to the Payment wizard, Coupons section

-At the bottom, click on "Customize"

-A screen with options will appear, you can customize any the text or message you want to have in Coupon Code