Kyle Shanahan: Packers at Lambeau Field will be a 'huge challenge' for 49ers

49ers Webzone - The San Francisco 49ers will be in a hostile environment on Saturday night, much more so than Sunday's game against the Dallas Cowboys. Lambeau Field in the playoffs is on another level. In addition to dealing with a loud home-team crowd, the 49ers will have to deal with the weather. Right now, the...