Add a file download Button-Tab-Dashlet

Hello all, thanks in advance for any help

I would like to add a Tab or Dashlet or Button in the upper main menu to let all my users download files from a common repository ( data sheets, etc)

Files are made available from the system administrator and directly copied to a folder ( not uploaded via SiuteCRM). Folder can be positioned anywhere, so ok to have it under the suitecrm folder structure.

OS Windows 7, Apache 2.0

How can I do that ?

Regards

Franco