The Packers are a slight favorite over the Steelers in Super Bowl XLV, according to sports books in Nevada. The Glantz-Culver line made Green Bay an early 2?-point favorite and put the total score at 45? points for the Feb. 6 game in Arlington, Texas. "That steam engine is still rolling," Jay Kornegay, executive director of the race and sports book at the Las Vegas Hilton, said. "It's going to be a very interesting Super Bowl because you have two heavyweights as far as popularity goes." The Super Bowl is the most popular betting game of the year for Nevada casinos, which won almost $6.9 million on last year's game as bettors wagered $82.7 million.