Pushing and Popping Stack Items

*? pushViewController:animated:

? popViewControllerAnimated:

? popToRootViewControllerAnimated:

? popToViewController:animated:
*

- (IBAction)b2ButtonPressed
{
  HomeViewController* mVC = [[HomeViewController alloc] init];
  UINavigationController *mNav = [[UINavigationController alloc] initWithRootViewController: mVC];   
  [self presentModalViewController: mNav animated:YES];
  [mVC release];
  [mNav release];
}