Currently in my cart I do not show the quantity box on the product listing or in the product info pages simply due to the nature of our products. In the shopping cart, the quantity does show, but there is no box to update the quantity. This means if a customer adds the item to the cart twice, they have to delete it and then re-add it. I know there is a better way, but I cant seem to find the correct switch in the admin.

Any thoughts?

zencart 1.3 (i know, i know . . . i need to upgrade, but with 1.4 right around the corner . . . . )