What's the difference between ModelAndView and ModelMap?

Is ModelMap just the new name in Spring 3 for a ModelAndView?

Does the functionality change in Spring 3?

Consider this code in a Spring 3 app using a ModelMap:

 @RequestMapping(value = "/order", method = RequestMethod.GET)
 public final String setup(final ModelMap model)
 {
  model.addAttribute(ORDER, new Order());
  return "setup";
 }

I would like to know what the equivalent use here of ModelAndView would be in an older Spring app? Would it just require a name change from ModelMap to ModelAndView to get this working in Spring 2.5?