I would have it up in the top row of section headings, amoungst the: "home download purchase support company" perhaps as an item called "Web Gizmo".
The page should also have an input field allowing you to type in your access key instead of requiring it in the URL, and there should be some kind of explanation of the whole thing (where to find your access key), with graphics introducing the idea of the 'library server' and how it looks in the browser.
