Magento: Controller override not working - magento

Question

Attempting to override the Cms/controllers/IndexController.
This is the directory structure of my module -
Local/MyCompany/FourOhFourExp/controllers/IndexController.php
Local/MyCompany/FourOhFourExp/etc/config.xml
The code for my IndexController is
<?php
require_once 'Mage'. DS .'Cms'. DS .'controllers'. DS .'IndexController.php';
class MyCompany_FourOhFourExp_IndexController extends Mage_Cms_IndexController
{
public function noRouteAction($coreRoute = null){
Mage::log('First Function');
header("Location: new_route.html");
die();
}
public function defaultNoRouteAction()
{
Mage::log('Second function!');
header("Location: new_route.html");
die();
}
}
?>
and this is the code for my config.xml file
<?xml version="1.0" encoding="UTF-8"?>
<config>
<modules>
<MyCompany_FourOhFourExp>
<version>0.1.0</version>
</MyCompany_FourOhFourExp>
</modules>
<frontend>
<routers>
<cms>
<args>
<modules>
<MyCompany_FourOhFourExp before="Mage_Cms">MyCompany_FourOhFourExp</MyCompany_FourOhFourExp>
</modules>
</args>
</cms>
</routers>
<events>
<controller_action_noroute>
<observers>
<cms>
<class>cms/observer</class>
<method>noRoute</method>
</cms>
</observers>
</controller_action_noroute>
</frontend>
</config>
Hoping someone can explain why this isn't overriding. I've looked through numerous tutorials and blog posts but have yet to figure out why it doesn't work.

Answer 1

There are lot of issue:
1)Modulepath:
As your controller class is MyCompany_FourOhFourExp_IndexController then path of class should be
app/code/local/MyCompany/FourOhFourExp
Local/MyCompany/controllers/IndexController
Local/MyCompany/etc/config.xml
change to
Local/MyCompany/FourOhFourExp/controllers/IndexController/php
Local/MyCompany/FourOhFourExp/etc/config.xml
2)Mage cms controller donot add properly
require_on Mage::getModuleDir('controllers', 'Mage_Cms'). DS .'IndexController.php';

Answer 2

What need to do:
add to app/code/local/Mage/Cms/controllers/IndexController.php , Mage::dispatchEvent('cms_controller_action_noroute', array('action'=>$this));
in your custom module, catch the Event