I am looking to find out wether or not I can use ejunkie, as a means to access control & track digital downloads, WITHOUT charging for them. I work for a Commecial photographer, and I am looking for a means by which to use something like a shopping cart for my clients to download thier photos, which they have already paid for, but maintain a "log" of which photos by whom, and when, without actually charging them any money for them. Will e-junkie accomplish this?