Batch Product Ordering from Product List Page

I have “Show advanced product list template” active in the admin, which allows multiple products to be added to the cart via check boxes and a click on “Add selected to cart”. This is cool feature but I need to add the quantity field so customers can order 2 of this, and 3 of these, etc.

I would be interested in doing this in both the Product List & Related Product List templates.

Has anyone do this mod?