diff --git a/administrator/language/en-GB/en-GB.lib_joomla.ini b/administrator/language/en-GB/en-GB.lib_joomla.ini
index b7929aa2d9d93..14b271b6cb0ea 100644
--- a/administrator/language/en-GB/en-GB.lib_joomla.ini
+++ b/administrator/language/en-GB/en-GB.lib_joomla.ini
@@ -539,11 +539,13 @@ JLIB_INSTALLER_ERROR_CREATE_DIRECTORY="JInstaller: :Install: Failed to create fo
 JLIB_INSTALLER_ERROR_CREATE_FOLDER_FAILED="Failed to create folder [%s]"
 JLIB_INSTALLER_ERROR_DEPRECATED_FORMAT="Deprecated install format (client="_QQ_"both"_QQ_"), use package installer in future."
 JLIB_INSTALLER_ERROR_DISCOVER_INSTALL_UNSUPPORTED="A %s extension can not be installed using the discover method. Please install this extension from Extension Manager: Install."
+JLIB_INSTALLER_ERROR_DOWNGRADE="Sorry! You cannot downgrade from version %s to %s"
 JLIB_INSTALLER_ERROR_DOWNLOAD_SERVER_CONNECT="Error connecting to the server: %s"
 JLIB_INSTALLER_ERROR_FAIL_COPY_FILE="JInstaller: :Install: Failed to copy file %1$s to %2$s"
 JLIB_INSTALLER_ERROR_FAIL_COPY_FOLDER="JInstaller: :Install: Failed to copy folder %1$s to %2$s"
 JLIB_INSTALLER_ERROR_FAILED_READING_NETWORK_RESOURCES="Failed reading network resource: %s"
 JLIB_INSTALLER_ERROR_FILE_EXISTS="JInstaller: :Install: File already exists %s"
+JLIB_INSTALLER_ERROR_FILE_FOLDER="Error on deleting file or folder %s"
 JLIB_INSTALLER_ERROR_FILE_UNINSTALL_INVALID_MANIFEST="Files Uninstall: Invalid manifest file."
 JLIB_INSTALLER_ERROR_FILE_UNINSTALL_INVALID_NOTFOUND_MANIFEST="Files Uninstall: Manifest file invalid or not found."
 JLIB_INSTALLER_ERROR_FILE_UNINSTALL_LOAD_ENTRY="Files Uninstall: Could not load extension entry."
@@ -602,7 +604,10 @@ JLIB_INSTALLER_ERROR_TPL_UNINSTALL_TEMPLATE_DIRECTORY="Template Uninstall: Folde
 JLIB_INSTALLER_ERROR_TPL_UNINSTALL_TEMPLATE_ID_EMPTY="Template Uninstall: Template ID is empty, can't uninstall files."
 JLIB_INSTALLER_ERROR_TPL_UNINSTALL_WARNCORETEMPLATE="Template Uninstall: Trying to uninstall a core template: %s"
 JLIB_INSTALLER_ERROR_UNKNOWN_CLIENT_TYPE="Unknown Client Type [%s]"
+JLIB_INSTALLER_FILE_ERROR_MOVE="Error on moving file %s"
 JLIB_INSTALLER_INSTALL="Install"
+JLIB_INSTALLER_MINIMUM_JOOMLA="You don't have the minimum Joomla version requirement of J%s"
+JLIB_INSTALLER_MINIMUM_PHP="Your server doesn't meet the minimum PHP version requirement of %s"
 JLIB_INSTALLER_NOTICE_LANG_RESET_USERS="Language set to Default for %d users."
 JLIB_INSTALLER_NOTICE_LANG_RESET_USERS_1="Language set to Default for %d user."
 JLIB_INSTALLER_UNINSTALL="Uninstall"
diff --git a/language/en-GB/en-GB.lib_joomla.ini b/language/en-GB/en-GB.lib_joomla.ini
index b7929aa2d9d93..14b271b6cb0ea 100644
--- a/language/en-GB/en-GB.lib_joomla.ini
+++ b/language/en-GB/en-GB.lib_joomla.ini
@@ -539,11 +539,13 @@ JLIB_INSTALLER_ERROR_CREATE_DIRECTORY="JInstaller: :Install: Failed to create fo
 JLIB_INSTALLER_ERROR_CREATE_FOLDER_FAILED="Failed to create folder [%s]"
 JLIB_INSTALLER_ERROR_DEPRECATED_FORMAT="Deprecated install format (client="_QQ_"both"_QQ_"), use package installer in future."
 JLIB_INSTALLER_ERROR_DISCOVER_INSTALL_UNSUPPORTED="A %s extension can not be installed using the discover method. Please install this extension from Extension Manager: Install."
+JLIB_INSTALLER_ERROR_DOWNGRADE="Sorry! You cannot downgrade from version %s to %s"
 JLIB_INSTALLER_ERROR_DOWNLOAD_SERVER_CONNECT="Error connecting to the server: %s"
 JLIB_INSTALLER_ERROR_FAIL_COPY_FILE="JInstaller: :Install: Failed to copy file %1$s to %2$s"
 JLIB_INSTALLER_ERROR_FAIL_COPY_FOLDER="JInstaller: :Install: Failed to copy folder %1$s to %2$s"
 JLIB_INSTALLER_ERROR_FAILED_READING_NETWORK_RESOURCES="Failed reading network resource: %s"
 JLIB_INSTALLER_ERROR_FILE_EXISTS="JInstaller: :Install: File already exists %s"
+JLIB_INSTALLER_ERROR_FILE_FOLDER="Error on deleting file or folder %s"
 JLIB_INSTALLER_ERROR_FILE_UNINSTALL_INVALID_MANIFEST="Files Uninstall: Invalid manifest file."
 JLIB_INSTALLER_ERROR_FILE_UNINSTALL_INVALID_NOTFOUND_MANIFEST="Files Uninstall: Manifest file invalid or not found."
 JLIB_INSTALLER_ERROR_FILE_UNINSTALL_LOAD_ENTRY="Files Uninstall: Could not load extension entry."
@@ -602,7 +604,10 @@ JLIB_INSTALLER_ERROR_TPL_UNINSTALL_TEMPLATE_DIRECTORY="Template Uninstall: Folde
 JLIB_INSTALLER_ERROR_TPL_UNINSTALL_TEMPLATE_ID_EMPTY="Template Uninstall: Template ID is empty, can't uninstall files."
 JLIB_INSTALLER_ERROR_TPL_UNINSTALL_WARNCORETEMPLATE="Template Uninstall: Trying to uninstall a core template: %s"
 JLIB_INSTALLER_ERROR_UNKNOWN_CLIENT_TYPE="Unknown Client Type [%s]"
+JLIB_INSTALLER_FILE_ERROR_MOVE="Error on moving file %s"
 JLIB_INSTALLER_INSTALL="Install"
+JLIB_INSTALLER_MINIMUM_JOOMLA="You don't have the minimum Joomla version requirement of J%s"
+JLIB_INSTALLER_MINIMUM_PHP="Your server doesn't meet the minimum PHP version requirement of %s"
 JLIB_INSTALLER_NOTICE_LANG_RESET_USERS="Language set to Default for %d users."
 JLIB_INSTALLER_NOTICE_LANG_RESET_USERS_1="Language set to Default for %d user."
 JLIB_INSTALLER_UNINSTALL="Uninstall"
diff --git a/libraries/cms/installer/script.php b/libraries/cms/installer/script.php
new file mode 100644
index 0000000000000..d6126635641f8
--- /dev/null
+++ b/libraries/cms/installer/script.php
@@ -0,0 +1,353 @@
+<?php
+/**
+ * @package     Joomla.Libraries
+ * @subpackage  Helper
+ *
+ * @copyright   Copyright (C) 2005 - 2014 Open Source Matters, Inc. All rights reserved.
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+defined('_JEXEC') or die;
+
+jimport('joomla.filesystem.file');
+jimport('joomla.filesystem.folder');
+
+/**
+ * Base install script for use by extensions providing helper methods for common behaviours.
+ *
+ * @since  3.6
+ */
+class JInstallerScript
+{
+	/**
+	 * The version number of the extension.
+	 *
+	 * @var    string
+	 * @since  3.6
+	 */
+	protected $release;
+
+	/**
+	 * The table the parameters are stored in.
+	 *
+	 * @var    string
+	 * @since  3.6
+	 */
+	protected $paramTable;
+
+	/**
+	 * The extension name. This should be set in the installer script.
+	 *
+	 * @var    string
+	 * @since  3.6
+	 */
+	protected $extension;
+
+	/**
+	 * A list of files to be deleted
+	 *
+	 * @var    array
+	 * @since  3.6
+	 */
+	protected $deleteFiles = array();
+
+	/**
+	 * A list of folders to be deleted
+	 *
+	 * @var    array
+	 * @since  3.6
+	 */
+	protected $deleteFolders = array();
+
+	/**
+	 * A list of CLI script files to be copied to the cli directory
+	 *
+	 * @var    array
+	 * @since  3.6
+	 */
+	protected $cliScriptFiles = array();
+
+	/**
+	 * Minimum PHP version required to install the extension
+	 *
+	 * @var    string
+	 * @since  3.6
+	 */
+	protected $minimumPhp;
+
+	/**
+	 * Minimum Joomla! version required to install the extension
+	 *
+	 * @var    string
+	 * @since  3.6
+	 */
+	protected $minimumJoomla;
+
+	/**
+	 * Allow downgrades of your extension
+	 *
+	 * Use at your own risk as if there is a change in functionality people may wish to downgrade.
+	 *
+	 * @var    boolean
+	 * @since  3.6
+	 */
+	protected $allowDowngrades = false;
+
+	/**
+	 * Function called before extension installation/update/removal procedure commences
+	 *
+	 * @param   string             $type    The type of change (install, update or discover_install, not uninstall)
+	 * @param   JInstallerAdapter  $parent  The class calling this method
+	 *
+	 * @return  boolean  True on success
+	 *
+	 * @since   3.6
+	 */
+	public function preflight($type, $parent)
+	{
+		// Check for the minimum PHP version before continuing
+		if (!empty($this->minimumPhp) && !version_compare(PHP_VERSION, $this->minimumPhp, '>'))
+		{
+			JLog::add(JText::sprintf('JLIB_INSTALLER_MINIMUM_PHP', $this->minimumPhp), JLog::WARNING, 'jerror');
+		}
+
+		// Check for the minimum Joomla version before continuing
+		if (!empty($this->minimumJoomla) && !version_compare(JVERSION, $this->minimumJoomla, '>'))
+		{
+			JLog::add(JText::sprintf('JLIB_INSTALLER_MINIMUM_JOOMLA', $this->minimumJoomla), JLog::WARNING, 'jerror');
+		}
+
+		// Extension manifest file version
+		$this->release = $parent->get("manifest")->version;
+		$extensionType = substr($this->extension, 0, 3);
+
+		// Modules parameters are located in the module table - else in the extension table
+		if ($extensionType === 'mod')
+		{
+			$this->paramTable = '#__modules';
+		}
+		else
+		{
+			$this->paramTable = '#__extensions';
+		}
+
+		// Abort if the extension being installed is not newer than the currently installed version
+		if (strtolower($type) == 'update' && !$this->allowDowngrades)
+		{
+			$manifest = $this->getItemArray('manifest_cache', '#__extensions', 'element', JFactory::getDbo()->quote($this->extension));
+			$oldRelease = $manifest['version'];
+
+			if (version_compare($this->release, $oldRelease, '<'))
+			{
+				JFactory::getApplication()->enqueueMessage(JText::sprintf('JLIB_INSTALLER_INCORRECT_SEQUENCE', $oldRelease, $this->release), 'error');
+
+				return false;
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	 * Gets each instance of a module in the #__modules table
+	 *
+	 * @param   boolean  $isModule  True if the extension is a module as this can have multiple instances
+	 *
+	 * @return  array  An array of ID's of the extension
+	 *
+	 * @since   3.6
+	 */
+	public function getInstances($isModule)
+	{
+		$db = JFactory::getDbo();
+		$query = $db->getQuery(true);
+
+		// Select the item(s) and retrieve the id
+		$query->select($db->quoteName('id'));
+
+		if ($isModule)
+		{
+			$query->from($db->quoteName('#__modules'))
+				->where($db->quoteName('module') . ' = ' . $db->quote($this->extension));
+		}
+		else
+		{
+			$query->from($db->quoteName('#__extensions'))
+				->where($db->quoteName('element') . ' = ' . $db->quote($this->extension));
+		}
+
+		// Set the query and obtain an array of id's
+		return $db->setQuery($query)->loadColumn();
+	}
+
+	/**
+	 * Gets parameter value in the extensions row of the extension table
+	 *
+	 * @param   string   $name  The name of the parameter to be retrieved
+	 * @param   integer  $id    The id of the item in the Param Table
+	 *
+	 * @return  string  The parameter desired
+	 *
+	 * @since   3.6
+	 */
+	public function getParam($name, $id = 0)
+	{
+		if (!is_int($id) || $id == 0)
+		{
+			// Return false if there is no item given
+			return false;
+		}
+
+		$params = $this->getItemArray('params', $this->paramTable, 'id', $id);
+
+		return $params[$name];
+	}
+
+	/**
+	 * Sets parameter values in the extensions row of the extension table. Note that the
+	 * this must be called separately for deleting and editing. Note if edit is called as a
+	 * type then if the param doesn't exist it will be created
+	 *
+	 * @param   array    $param_array  The array of parameters to be added/edited/removed
+	 * @param   string   $type         The type of change to be made to the param (edit/remove)
+	 * @param   integer  $id           The id of the item in the relevant table
+	 *
+	 * @return  boolean  True on success
+	 *
+	 * @since   3.6
+	 */
+	public function setParams($param_array = null, $type = 'edit', $id = 0)
+	{
+		if (!is_int($id) || $id == 0)
+		{
+			// Return false if there is no valid item given
+			return false;
+		}
+
+		$params = $this->getItemArray('params', $this->paramTable, 'id', $id);
+
+		if ($param_array)
+		{
+			foreach ($param_array as $name => $value)
+			{
+				if ($type == 'edit')
+				{
+					// Add or edit the new variable(s) to the existing params
+					if (is_array($value))
+					{
+						// Convert an array into a json encoded string
+						$params[(string) $name] = array_values($value);
+					}
+					else
+					{
+						$params[(string) $name] = (string) $value;
+					}
+				}
+				elseif ($type == 'remove')
+				{
+					// Unset the parameter from the array
+					unset($params[(string) $name]);
+				}
+			}
+		}
+
+		// Store the combined new and existing values back as a JSON string
+		$paramsString = json_encode($params);
+
+		$db = JFactory::getDbo();
+		$query = $db->getQuery(true)
+			->update($db->quoteName($this->paramTable))
+			->set('params = ' . $db->quote($paramsString))
+			->where('id = ' . $id);
+
+		// Update table
+		$db->setQuery($query)->execute();
+
+		return true;
+	}
+
+	/**
+	 * Builds a standard select query to produce better DRY code in this script.
+	 * This should produce a single unique cell which is json encoded - it will then
+	 * return an associated array with this data in.
+	 *
+	 * @param   string  $element     The element to get from the query
+	 * @param   string  $table       The table to search for the data in
+	 * @param   string  $column      The column of the database to search from
+	 * @param   mixed   $identifier  The integer id or the already quoted string
+	 *
+	 * @return  array  Associated array containing data from the cell
+	 *
+	 * @since   3.6
+	 */
+	public function getItemArray($element, $table, $column, $identifier)
+	{
+		// Get the DB and query objects
+		$db = JFactory::getDbo();
+
+		// Build the query
+		$query = $db->getQuery(true)
+			->select($db->quoteName($element))
+			->from($db->quoteName($table))
+			->where($db->quoteName($column) . ' = ' . $identifier);
+		$db->setQuery($query);
+
+		// Load the single cell and json_decode data
+		return json_decode($db->loadResult(), true);
+	}
+
+	/**
+	 * Remove the files and folders in the given array from
+	 *
+	 * @return  void
+	 *
+	 * @since   3.6
+	 */
+	public function removeFiles()
+	{
+		if (!empty($this->deleteFiles))
+		{
+			foreach ($this->deleteFiles as $file)
+			{
+				if (file_exists(JPATH_ROOT . $file) && !JFile::delete(JPATH_ROOT . $file))
+				{
+					echo JText::sprintf('JLIB_INSTALLER_ERROR_FILE_FOLDER', $file) . '<br />';
+				}
+			}
+		}
+
+		if (!empty($this->deleteFolders))
+		{
+			foreach ($this->deleteFolders as $folder)
+			{
+				if (JFolder::exists(JPATH_ROOT . $folder) && !JFolder::delete(JPATH_ROOT . $folder))
+				{
+					echo JText::sprintf('JLIB_INSTALLER_ERROR_FILE_FOLDER', $folder) . '<br />';
+				}
+			}
+		}
+	}
+
+	/**
+	 * Moves the CLI scripts into the CLI folder in the CMS
+	 *
+	 * @return  void
+	 *
+	 * @since   3.6
+	 */
+	public function moveCliFiles()
+	{
+		if (!empty($this->cliScriptFiles))
+		{
+			foreach ($this->cliScriptFiles as $file)
+			{
+				$name = basename($file);
+
+				if (file_exists(JPATH_ROOT . $file) && !JFile::move(JPATH_ROOT . $file, JPATH_ROOT . '/cli/' . $name))
+				{
+					echo JText::sprintf('JLIB_INSTALLER_FILE_ERROR_MOVE', $name);
+				}
+			}
+		}
+	}
+}