Scotland striker Kenny Miller netted a double and Steven Naismith wrapped up the romp after Lee McCulloch's 14th-minute opener was canceled out by Carl Finnegan of Falkirk, who made a poor start under new manager Eddie May.
Lee Westwood and Paul Casey are one shot further behind at six-under with a third Englishman Steven Tiley also on that mark after 10 holes when play was called off.