The Packers will have to call on their depth if they want to make it four out of five to start the 2010 season.  A date with the Washington Redskins awaits the Pack Sunday at Fed Ex field and Green Bay will be without Morgan Burnett, Nick Barnett and Brandon Chillar on defense, and Mark Tauscher will be sitting this one out for an offense that is already without Ryan Grant for the year.  Tauscher injured his shoulder on a PAT protection against the Lions last week and hasn't practiced all week.  Number one pick Brian Bulaga will get the call.  On defense, Chillar also has a shoulder injury that will force him out of a second straight game.  Barnett learns today if he'll need surgery to repair his wrist injury.  Desmond Bishop will open at inside linebacker. As for the secondary, Burnett was placed on injured reserve Thursday wtih linebacker Maurice Simpkins, the former Green Bay Blizzard player, brought up from the practice squad.  Nick Collins has had only limited work this week with a sore knee and there's a chance, both safety spots could feature backups among Derrick Martin, Charlie Peprah or Jarrett Bush.   Add all that to a formidable Redskin team under new coach Mike Shanahan and veteran quarterback Donovan McNabb and it will be a test for the Pack.   The Redskins have been hot and cold in their 2-2 start, hot against Division rivals Dallas and Philadelphia, but cold in blowing a 17 point halftime lead to Houston, losing in overtime, and falling to the rebuilding Rams in St. Louis two weeks ago 30-16.  Clinton Portis, their leading rusher is out with a groin injury, Ryan Torian gets the call at running back.  Former Packers punter Josh Bidwell was placed on injured reserve Thursday and veteran Hunter Smith was signed.  The Skins are giving up over 400 yards a game on defense, over 300 yards through the air.  The offense is still a work in progress with McNabb completing less than 58 percent of his passes with Santana Moss leading receivers with 22 catches, tight end Chris Cooley with 16.  The Packers are a slight favorite on the road.  Here's what Mike McCarthy and some of the players have to say about the matchup and keys to the game.