title: How to duplicate blockuserinfo module or inherite of it
body: <p>i would like to add an access for professional users on my web site. i am able to duplicate the blockuserinfo and install it in the displayNav hook.
  I would like to display a different content text for the page index.php?controller=authentication&amp;back=my-account.
  What template should i need to update ?
  thank you</p>