Thanks for the tip, John: I may use that if I don't succeed in finding the "perfect" tech I'm looking for. So far, I think my pick is Ampache (http://ampache.org/) which does exactly what I intended, though the management of "Catalogs" (where your mp3 are located) is a little bit buggy. Thanks for all the help, i. -- Ismael Peña-López Department of Law and Political Science Open University of Catalonia http://ictlogy.net Av. Tibidabo 39-43 08035 Barcelona