What DocuShare version you're using? As I remember DocuShare stores
documents in the filesystem and clients use a special Windows Explorer
shell namespace extension (to logon and browse hierarchically). I don't
believe that this is possible at all. Possibly you can index the docs
if you add an appropriate SPS content source with the DocuShare portal
URL. But don't ask me how to get around the authentication (password
query). Please let us know!