First of all, the Object put in request scope by SaveErrors is not a HashMap, but an ActionMessages instance. Note that since ActionErrors is a subclass of ActionMessages, it could contain an instance of ActionErrors also.
The best way to retrieve and display it in your JSP is simply to use either the <html:errrors/> or <html:messages/> tag.
If you really want to retrieve it in a scriptlet, this is the code:
[ January 12, 2007: Message edited by: Merrill Higginson ]