The elusive 37th President is lurking here somewhere among the 70,000 pages of documents, 15 minutes of video, 700 photos, and assorted movie clips. But the organization is contrived, the narration by former Nixon aide Alexander Butterfield unnecessary, and fact and fiction blurred. On a clickable tour of the White House, for instance, Anthony Hopkins pops up in scenes from the Oliver Stone movie as though he really were the President, with the apparent intention of spicing up an otherwise dry library of speeches, transcripts, memos, and letters. In Stone’s five-minute interview — the director’s only new contribution to the CD-ROM — he describes the Nixon presidency as ”shrouded in covert detail.” Ditto for NIXON: The CD-ROM. C