Controllers to handle errors

[eluser]Unknown[/eluser]
Hi. Sorry to bump this.

I've built a controller to act as a 404 page. I currently have modified the exception library to send a redirection header to the controller, but there *must* be a better way to do this. For example, currently it goes like this: the page that the user requested returns 302 found instead of 404 (the actual 404 controller returns a 404 header, though).

I've went through pretty much every topic concerning this and I haven't found a good way to do it. How much would it take to modify the exception library to call a controller instead?