Removing the main-controller's name from url

Hi,

I have made a website which has almost all the operations under the same controller named "mainsite".
So my urls look like this: www.mydomain.com/mainsite/products or www.mydomain.com/mainsite/page/3 etc.
Is it possible to completely remove the "mainsite" -part from url with routes.php? Or with some other "trick" so that I wouldn't need to start moving everything from my mainsite-controller to other controllers?

You can use the routes like it should be. Something like this...

PHP Code:

$route['products'] = 'mainsite/products';
$route['page/(:num)'] = 'mainsite/page/3';