iphone tableview within detailview

Question

Hi, im pushing a "detailview" to a navigationcontroller (RootViewController.m)

[self.navigationController pushViewController:MyDetailView animated:YES];

"detailview" contains a tableview (DetailViewController.m)

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
  //push seconddetailview into navigationcontroller - how can i do that?

}

how do i load the seconddetailView into the main navigationcontroller?

thanks

pete