On a visit to Monticello, N.Y., an open top, manual transmission, deserted two-lane roads and a gorgeous fall day are an unbeatable combination. By VICTOR E. SASSON EDITOR MONTICELLO, N.Y. -- Quiet has returned to the two-lane roads that wind past clusters of homes framed by fall colors. This week saw the annual invasion of the International Motor Press Association, whose members were unleashed at the wheels of performance and super cars with incredibly loud mufflers. IMPA, the country's oldest organization of automotive journalists and public relations professionals, set up camp at the Monticello Motor Club, a 4.1-mile race circuit and playground for the wealthy nestled in the Catskill Mountains. Many sponsors Sponsors of the so-called Test Days included Detroit and foreign automakers, manufacturers of tires and automobile sound equipment, PR Newswire and the private club where the event was held. Previous Test Days took place at Pocono Raceway and Lime Rock Park. On Wednesday, wr...