how to redirect from CI index.php to folder/index.php?

[eluser]qwertyjjj[/eluser]
[quote author="InsiteFX" date="1329392957"]

Code:

$route['catalog'] = 'catalog/index';

In Contoller

Code:

redirect('catalog/index', 'refresh');

[/quote]

Sorry, I'm a bit lost on that (I've read through tutorials but still a long way to go with learning)
The controller folder only has welcome.php and index.html.
Do I need to make an index.php controller and then an index.php view?

Where do I put $route['catalog'] = 'catalog/index'; is it application/config?
I changed welcome.php in the controllers to:

public function index()
{
redirect('catalog/index', 'refresh');
//$this->load->view('welcome_message');
}

but now I just get a blank page when going to http://localhost

...or am I supposed to put the entire OSCommerce application, stylesheets, and folders into the application folder?