Free Shipping for One Product Only in Cart

Hi –

I’m using the free version and am asking if I need to purchase the pro version for this feature.

I have a gift certificate I need to give a “free shipping” class. The problem is that if there are multiple items in the cart that have a paid shipping class, all of them are given free shipping.

I just need one product to have free shipping and the paid shipping rules will apply to the rest of the cart as normal.

If it helps, I’m trying to make the “gift certificate” product free. Here’s my shop: https://kgh.72b.myftpupload.com/shop/

The page I need help with: [log in to see the link]