I am thrilled!
Here is the link: http://sew-whats-new.com/group/sewing-purses-totes-handbags-free-pdf-epatterns/forum/topics/zips-and-bags-3-concealed-recessed-top-edge-zip?xg_source=activity
It seems that installing a recessed top edge zip in a bag is a difficult task. But, once you know how to do it, it is not difficult at all.
Here are some examples of a concealed/recessed top edge zip: