public function FileNotFound() {
      $this->RemoveCssFile('admin.css');
      $this->AddCssFile('style.css');
      $this->MasterView = 'default';
      
      $this->CssClass = 'SplashMessage NoPanel';
      
      if ($this->Data('ViewPaths')) {
         Trace($this->Data('ViewPaths'), 'View Paths');
      }
      
      $this->SetData('_NoMessages', TRUE);
      
      if ($this->DeliveryMethod() == DELIVERY_METHOD_XHTML) {
         header("HTTP/1.0 404", TRUE, 404);
         $this->Render();
      } else
         $this->RenderException(NotFoundException());
   }