uri segment 3 without index.php in the uri/url?

[eluser]Dennis Rasmussen[/eluser]
To remove index.php read http://codeigniter.com/wiki/Dreamhost_.htaccess/
And there's a couple of methods here to use the first segment as a parameter: http://ellislab.com/forums/viewthread/104074/

If you didn't find what you're looking for, I've seen something like $route['404'] which can be used as well.