How do I do this:

Create a gift certificate that can only be used in a certain category.

All products in that category are theoretically worth about the same amount, that is beside the point, but I want that gift certificate to only be able to redeem, in whole, any one of the products in that category.

And then I want that gift certificate to have no value after that.

I dont want the customer to be able to use the gift certificate for any other categories or products in my store.

Sound crazy?

Thanks a ton!

-Chris