Hi,

I have set up a free shipping coupon in Admin/Gift Certificate/Coupons. In the configuration I checked the "Free Shipping" box.

Now I test with check out using this coupon, but I am able to select Priority or Express Mail from USPS module. Is there a way to disable the selection for Priority/Express Mail when this coupon is applied? (I only want Free shipping using parcel post)
Any better way to accomplish this?

Any advice is much appreciated!