I use ErrorHandler in my application to intercept exceptions, but I also want to be able to redirect user to error screen using URL:
class SomeController extends Zend_Controller_Action {
    public function someAction() {
        ...
        $this->_redirect('/error/device-unknown/id/12345');
    }
}
This however takes me to standard web server 404 page.
I know I could use $this->_forward() instead, but I already get target location in form of URL. Is there a way to make Zend use URL to present error screen?