The 49ers have signed 29-year old kicker Shane Andrus to handle the place kicking duties on Sunday.  Ricky Schmitt hurt his groin in practice this week and he will be unavailable tomorrow against the Rams.  Andrus played in 3 games earlier this season for the Buccaneers and he was 0 for 1 on field goals and 6 of 6 on extra points.