Ciao Rosario,
oopps I forgot that thread . Need more than a bit of time to focus on your scenario, which is actually interesting.
In the meantime take a look at http://moodle.org/mod/data/view.php?d=13&rid=991:
- http://www.citricity.com/moodlegpl/windowssharewebclient/
- http://www.citricity.com/moodlegpl/ldapcapture/
Those links seem not to address your scenario but to kindly suggest that among the Moodle repos a SMB/CIFS one could be a nice-to-have, at least to avoid the extra load of setting up a WebDAV server to present Moodle a set of Windows shares.
HTH,
Matteo