Check these links for assistance on how to install plug-ins in:
- WordPress (https://codex.wordpress.org/Managing_Plugins)
- Joomla (http://help.joomla.org/index2.php?option=com_content&task=view&id=1476&Itemid=278)
- Drupal (https://drupal.org/documentation/install/modules-themes/modules-7).
After you have installed the RUM plug-in, just enter the tracking ID under the User ID field in the respective CMS, as shown in the screens below: