Group Policy

Hey guys, I got my domain to work after a month, all users can sign in etc.
But I want to edit the group policy a bit

In a list can you tell me if this is possible. (It must be, my school has done it)

• 1. Automatically map a network drive to a specific drive letter
  2. Enable the windows sidebar and choose what gadgets they are on.
  3. Choose whats on the desktop
  4. Lastly, A protected folder for one person each (e.g If another user clicks on it says access is denied)

Thank you in advance

1) A logon script would be best in this regards.
4) In AD you can specify a home folder which is specific to a user. The folder is just a share where you only allow the specific user to has access (permission).