diff --git a/phpBB/includes/acp/info/acp_extensions.php b/phpBB/includes/acp/info/acp_extensions.php
index f5953fb1dd..03d7059165 100644
--- a/phpBB/includes/acp/info/acp_extensions.php
+++ b/phpBB/includes/acp/info/acp_extensions.php
@@ -16,10 +16,10 @@ class acp_extensions_info
 	{
 		return array(
 			'filename'	=> 'acp_extensions',
-			'title'		=> 'ACP_EXTENSIONS',
+			'title'		=> 'ACP_EXTENSIONS_MANAGEMENT',
 			'version'	=> '1.0.0',
 			'modes'		=> array(
-				'main'		=> array('title' => 'ACP_EXTENSIONS', 'auth' => 'acl_a_extensions', 'cat' => array('ACP_GENERAL_TASKS')),
+				'main'		=> array('title' => 'ACP_EXTENSIONS', 'auth' => 'acl_a_extensions', 'cat' => array('ACP_EXTENSIONS_MANAGEMENT')),
 			),
 		);
 	}
diff --git a/phpBB/includes/acp/info/acp_language.php b/phpBB/includes/acp/info/acp_language.php
index 85dfb119ea..7f33a22fa6 100644
--- a/phpBB/includes/acp/info/acp_language.php
+++ b/phpBB/includes/acp/info/acp_language.php
@@ -19,7 +19,7 @@ class acp_language_info
 			'title'		=> 'ACP_LANGUAGE',
 			'version'	=> '1.0.0',
 			'modes'		=> array(
-				'lang_packs'		=> array('title' => 'ACP_LANGUAGE_PACKS', 'auth' => 'acl_a_language', 'cat' => array('ACP_GENERAL_TASKS')),
+				'lang_packs'		=> array('title' => 'ACP_LANGUAGE_PACKS', 'auth' => 'acl_a_language', 'cat' => array('ACP_LANGUAGE')),
 			),
 		);
 	}
diff --git a/phpBB/install/database_update.php b/phpBB/install/database_update.php
index 30592b995d..7aa346b817 100644
--- a/phpBB/install/database_update.php
+++ b/phpBB/install/database_update.php
@@ -818,6 +818,70 @@ function _add_modules($modules_to_install)
 	$_module->remove_cache_file();
 }
 
+/**
+* Add a new permission, optionally copy permission setting from another
+*
+* @param auth_admin $auth_admin auth_admin object
+* @param dbal $db Database object
+* @param string $permission_name Name of the permission to add
+* @param bool $is_global True is global, false is local
+* @param string $copy_from Optional permission name from which to copy
+* @return bool true on success, false on failure
+*/
+function _add_permission(auth_admin $auth_admin, dbal $db, $permission_name, $is_global = true, $copy_from = '')
+{
+	// Only add a permission that don't already exist
+	if (!empty($auth_admin->acl_options['id'][$permission_name]))
+	{
+		return true;
+	}
+
+	$permission_scope = $is_global ? 'global' : 'local';
+
+	$result = $auth_admin->acl_add_option(array(
+		$permission_scope => array($permission_name),
+	));
+
+	if (!$result)
+	{
+		return $result;
+	}
+
+	// The permission has been added, now we can copy it if needed
+	if ($copy_from && isset($auth_admin->acl_options['id'][$copy_from]))
+	{
+		$old_id = $auth_admin->acl_options['id'][$copy_from];
+		$new_id = $auth_admin->acl_options['id'][$permission_name];
+
+		$tables = array(ACL_GROUPS_TABLE, ACL_ROLES_DATA_TABLE, ACL_USERS_TABLE);
+
+		foreach ($tables as $table)
+		{
+			$sql = 'SELECT *
+				FROM ' . $table . '
+				WHERE auth_option_id = ' . $old_id;
+			$result = _sql($sql, $errored, $error_ary);
+
+			$sql_ary = array();
+			while ($row = $db->sql_fetchrow($result))
+			{
+				$row['auth_option_id'] = $new_id;
+				$sql_ary[] = $row;
+			}
+			$db->sql_freeresult($result);
+
+			if (sizeof($sql_ary))
+			{
+				$db->sql_multi_insert($table, $sql_ary);
+			}
+		}
+
+		$auth_admin->acl_clear_prefetch();
+	}
+
+	return true;
+}
+
 /****************************************************************************
 * ADD YOUR DATABASE SCHEMA CHANGES HERE										*
 *****************************************************************************/
@@ -2459,6 +2523,12 @@ function change_database_data(&$no_updates, $version)
 				unset($next_legend);
 			}
 
+			// Rename styles module to Customise
+			$sql = 'UPDATE ' . MODULES_TABLE . "
+				SET module_langname = 'ACP_CAT_CUSTOMISE'
+				WHERE module_langname = 'ACP_CAT_STYLES'";
+			_sql($sql, $errored, $error_ary);
+
 			// Install modules
 			$modules_to_install = array(
 				'position'	=> array(
@@ -2496,10 +2566,67 @@ function change_database_data(&$no_updates, $version)
 					'auth'		=> '',
 					'cat'		=> 'UCP_PROFILE',
 				),
+				// To add a category, the mode and basename must be empty
+				// The mode is taken from the array key
+				'' => array(
+					'base'		=> '',
+					'class'		=> 'acp',
+					'title'		=> 'ACP_EXTENSION_MANAGEMENT',
+					'auth'		=> 'acl_a_extensions',
+					'cat'		=> 'ACP_CAT_CUSTOMISE',
+				),
+				'extensions'    => array(
+					'base'		=> 'acp_extensions',
+					'class'		=> 'acp',
+					'title'		=> 'ACP_EXTENSIONS',
+					'auth'		=> 'acl_a_extensions',
+					'cat'		=> 'ACP_EXTENSION_MANAGEMENT',
+				),
 			);
 
 			_add_modules($modules_to_install);
 
+			// We need a separate array for the new language sub heading
+			// because it requires another empty key
+			$modules_to_install = array(
+				'' => array(
+					'base'	=> '',
+					'class'	=> 'acp',
+					'title'	=> 'ACP_LANGUAGE',
+					'auth'	=> 'acl_a_language',
+					'cat'	=> 'ACP_CAT_CUSTOMISE',
+				),
+			);
+
+			_add_modules($modules_to_install);
+
+			// Move language management to new location in the Customise tab
+			// First get language module id
+			$sql = 'SELECT module_id FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'acp_language'";
+			$result = $db->sql_query($sql);
+			$language_module_id = $db->sql_fetchfield('module_id');
+			$db->sql_freeresult($result);
+			// Next get language management module id of the one just created
+			$sql = 'SELECT module_id FROM ' . MODULES_TABLE . "
+				WHERE module_langname = 'ACP_LANGUAGE'";
+			$result = $db->sql_query($sql);
+			$language_management_module_id = $db->sql_fetchfield('module_id');
+			$db->sql_freeresult($result);
+
+			if (!class_exists('acp_modules'))
+			{
+				include($phpbb_root_path . 'includes/acp/acp_modules.' . $phpEx);
+			}
+			// acp_modules calls adm_back_link, which is undefined at this point
+			if (!function_exists('adm_back_link'))
+			{
+				include($phpbb_root_path . 'includes/functions_acp.' . $phpEx);
+			}
+			$module_manager = new acp_modules();
+			$module_manager->module_class = 'acp';
+			$module_manager->move_module($language_module_id, $language_management_module_id);
+
 			$sql = 'DELETE FROM ' . MODULES_TABLE . "
 				WHERE (module_basename = 'styles' OR module_basename = 'acp_styles') AND (module_mode = 'imageset' OR module_mode = 'theme' OR module_mode = 'template')";
 			_sql($sql, $errored, $error_ary);
@@ -2790,45 +2917,12 @@ function change_database_data(&$no_updates, $version)
 			}
 			$db->sql_freeresult($result);
 
-			// Add new permission u_chgprofileinfo and duplicate settings from u_sig
+			// Add new permissions
 			include_once($phpbb_root_path . 'includes/acp/auth.' . $phpEx);
 			$auth_admin = new auth_admin();
 
-			// Only add the new permission if it does not already exist
-			if (empty($auth_admin->acl_options['id']['u_chgprofileinfo']))
-			{
-				$auth_admin->acl_add_option(array('global' => array('u_chgprofileinfo')));
-
-				// Now the tricky part, filling the permission
-				$old_id = $auth_admin->acl_options['id']['u_sig'];
-				$new_id = $auth_admin->acl_options['id']['u_chgprofileinfo'];
-
-				$tables = array(ACL_GROUPS_TABLE, ACL_ROLES_DATA_TABLE, ACL_USERS_TABLE);
-
-				foreach ($tables as $table)
-				{
-					$sql = 'SELECT *
-						FROM ' . $table . '
-						WHERE auth_option_id = ' . $old_id;
-					$result = _sql($sql, $errored, $error_ary);
-
-					$sql_ary = array();
-					while ($row = $db->sql_fetchrow($result))
-					{
-						$row['auth_option_id'] = $new_id;
-						$sql_ary[] = $row;
-					}
-					$db->sql_freeresult($result);
-
-					if (sizeof($sql_ary))
-					{
-						$db->sql_multi_insert($table, $sql_ary);
-					}
-				}
-
-				// Remove any old permission entries
-				$auth_admin->acl_clear_prefetch();
-			}
+			_add_permission($auth_admin, $db, 'u_chgprofileinfo', true, 'u_sig');
+			_add_permission($auth_admin, $db, 'a_extensions', true, 'a_styles');
 
 			// Update the auth setting for the module
 			$sql = 'UPDATE ' . MODULES_TABLE . "
diff --git a/phpBB/install/install_install.php b/phpBB/install/install_install.php
index 4b2fa046bc..1857b9f3fd 100644
--- a/phpBB/install/install_install.php
+++ b/phpBB/install/install_install.php
@@ -2095,9 +2095,10 @@ class install_install extends module
 				'ACP_PERMISSION_ROLES',
 				'ACP_PERMISSION_MASKS',
 			),
-			'ACP_CAT_STYLES'		=> array(
+			'ACP_CAT_CUSTOMISE'		=> array(
 				'ACP_STYLE_MANAGEMENT',
-				'ACP_STYLE_COMPONENTS',
+				'ACP_EXTENSIONS_MANAGEMENT',
+				'ACP_LANGUAGE',
 			),
 			'ACP_CAT_MAINTENANCE'	=> array(
 				'ACP_FORUM_LOGS',
diff --git a/phpBB/language/en/acp/common.php b/phpBB/language/en/acp/common.php
index 5eb10d50b3..427e4f4d98 100644
--- a/phpBB/language/en/acp/common.php
+++ b/phpBB/language/en/acp/common.php
@@ -59,6 +59,7 @@ $lang = array_merge($lang, array(
 
 	'ACP_CAPTCHA'				=> 'CAPTCHA',
 
+	'ACP_CAT_CUSTOMISE'			=> 'Customise',
 	'ACP_CAT_DATABASE'			=> 'Database',
 	'ACP_CAT_DOT_MODS'			=> '.MODs',
 	'ACP_CAT_FORUMS'			=> 'Forums',
@@ -80,8 +81,10 @@ $lang = array_merge($lang, array(
 	'ACP_DISALLOW_USERNAMES'	=> 'Disallow usernames',
 
 	'ACP_EMAIL_SETTINGS'		=> 'Email settings',
-	'ACP_EXTENSION_GROUPS'		=> 'Manage extension groups',
-	'ACP_EXTENSIONS'			=> 'Manage board extensions',
+	'ACP_EXTENSION_GROUPS'		=> 'Manage attachment extension groups',
+	'ACP_EXTENSION_MANAGEMENT'	=> 'Extension management',
+	'ACP_EXTENSIONS'			=> 'Extensions',
+
 
 	'ACP_FORUM_BASED_PERMISSIONS'	=> 'Forum based permissions',
 	'ACP_FORUM_LOGS'				=> 'Forum logs',
@@ -119,7 +122,7 @@ $lang = array_merge($lang, array(
 	'ACP_MANAGE_ATTACHMENTS'			=> 'Manage attachments',
 	'ACP_MANAGE_ATTACHMENTS_EXPLAIN'	=> 'Here you can list and delete files attached to posts and private messages.',
 
-	'ACP_MANAGE_EXTENSIONS'		=> 'Manage extensions',
+	'ACP_MANAGE_EXTENSIONS'		=> 'Manage attachment extensions',
 	'ACP_MANAGE_FORUMS'			=> 'Manage forums',
 	'ACP_MANAGE_RANKS'			=> 'Manage ranks',
 	'ACP_MANAGE_REASONS'		=> 'Manage report/denial reasons',
@@ -166,7 +169,6 @@ $lang = array_merge($lang, array(
 	'ACP_SERVER_SETTINGS'		=> 'Server settings',
 	'ACP_SIGNATURE_SETTINGS'	=> 'Signature settings',
 	'ACP_SMILIES'				=> 'Smilies',
-	'ACP_STYLE_COMPONENTS'		=> 'Style components',
 	'ACP_STYLE_MANAGEMENT'		=> 'Style management',
 	'ACP_STYLES'				=> 'Styles',
 	'ACP_STYLES_CACHE'			=> 'Purge Cache',