Former Hewlett-Packard Chairwoman <A HREF="http://news.yahoo.com/s/ap/20061115/ap_on_bi_ge/hewlett_packard_directors">Patricia Dunn pleaded not guilty</A> Wednesday to four felony identity theft and fraud charges for allegedly instigating the company's ill-fated spying probe into boardroom leaks. Dunn appeared briefly for her arraignment in Santa Clara County Superior Court and was released on her own recognizance after her lawyer entered the plea for her. She and her attorney, Raj Chatterjee, declined to comment as they left court.