[ros-users] how to download the stack of wg_robots_gazebo

     To install ros in my PC, I used "sudo apt-get install ros-cturtle-base"
and "sudo apt-get install ros-cturtle-pr2all". When I learn "Building a Map
in Simulation" in the *
http://www.ros.org/wiki/pr2_simulator/Tutorials/BuildingAMapInSimulation. *I
found that pr2_gazebo_wg doesn't exist in my ros. And I find it in the stack
of wg_robots_gazebo, but how can I get this stack? Thanks in advance!