1. Go to the Admin-User-Access page.
2. Download the component for your version of Joomla.
3. Install the component as a component.
   For Joomla 1.0.x:
   1. Go to 'installers > components'.
   2. At 'Install new component' click 'browse' and select the file which you just downloaded.
      The file name starts with 'com_admin_user_access'.
   3. Click 'Upload File & Install'.
      The file is being uploaded and installed.
   For Joomla 1.5.x:
   1. Go to 'Extensions > Install/Uninstall'.
   2. Click 'browse' and select the file which you just downloaded.
      The file name starts with 'com_admin_user_access'.
   3. Click 'Upload File & Install'.
      The file is being uploaded and installed.

1. Go to the Admin-User-Access page.
2. Download the module for your version of Joomla for the backend.
3. Install the module.
   For Joomla 1.0.x:
   1. Go to 'Installers > Modules'.
   2. At 'Install new Modules' click 'browse' and select the file which you just downloaded.
      The file name starts with 'mod_admin_user_access_backend'.
   3. Click 'Upload File & Install'.
      The file is being uploaded and installed.
   4. Go to 'Modules > Administrator Modules > admin user access'.
   5. Set position -> 'header'.
   6. Set publish -> 'yes'.
   7. Click 'save'.
   For Joomla 1.5.x:
   1. Go to 'Extensions > Install/Uninstall'.
   2. Click 'browse' and select the file which you just downloaded.
      The file name starts with 'mod_admin_user_access_backend'.
   3. Click 'Upload File & Install'.
      The file is being uploaded and installed.
   4. Go to 'Extensions > Module Manager > Administrator > admin user access'.
   5. Set enabled -> 'yes'.
   6. Set position -> 'menu'.
   7. Set order -> right above 'admin menu'.
   8. Click 'save'.

1. Go to the Admin-User-Access page.
2. Download the module for your version of Joomla for the frontend.
3. Install the module.
   For Joomla 1.0.x:
   1. Go to 'Installers > Modules'.
   2. At 'Install new Modules' click 'browse' and select the file which you just downloaded.
      The file name starts with 'mod_admin_user_access_frontend'.
   3. Click 'Upload File & Install'.
      The file is being uploaded and installed.
   4. Go to 'Modules > admin user access frontend'.
   5. Set  position to a position which is on each page in your site. Usually 'left' is save.
   6. Set publish -> 'yes'.
   7. Hide the title.
   8. Click 'save'.
   For Joomla 1.5.x:
   1. Go to 'Extensions > Install/Uninstall'.
   2. Click 'browse' and select the file which you just downloaded.
      The file name starts with 'mod_admin_user_access_frontend'.
   3. Click 'Upload File & Install'.
      The file is being uploaded and installed.
   4. Go to 'Extensions > Module Manager > admin user access frontend'.
   5. Set enabled -> 'yes'.
   6. Set  position to a position which is on each page in your site. Usually 'left' is save.
   7. Hide the title.
   8. Click 'save'.

The user plugin is only for the trial-version and pro-version. Not for the free-version.

The user plugin is only available for Joomla 1.5.x. Not for Joomla 1.0.x

1. Go to the Admin-User-Access page.
2. Download the user-plugin.
3. Go to 'Extensions' > 'Install/Uninstall'.
4. Click 'browse' and select the file which you just downloaded.
   The file name starts with 'plugin_admin_user_access_user'.
5. Click 'Upload File & Install'.
   The file is being uploaded and installed.
6. Go to 'extensions' > 'plugin manager'.
7. Click on plugin 'Admin-User-Access (user)'.
8. At 'Enabled:' select 'Yes'.
9. Click 'save'.