Production assistants, sound technicians and audio engineers worked feverishly Wednesday to transform Metropolitan Park into a giant stage for recording artist Jessica Simpson, who will headline a nationally televised NFL Kickoff concert tonight. The concert not only opens the NFL season, but will also help introduce Jacksonville, which is hosting the 2005 Super Bowl, to a national audience. Several local landmarks will also be shown during the broadcast. Locally, a large turnout is expected for the show.