Get started with gazebo

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Hi all,

I just started to play with ROS and gazebo. I've went through the gazebo tutorial and wanted to move to pr2_gazebo tutorial. But now, I'm have problems of installing pr2_gazebo.

First, I checked out the pr2_simulator at ( https://code.ros.org/svn/wg-ros-pkg/s... ) Then, I tried "rosdep install pr2_gazebo", but got a bunch of error messages (e.g., Failed to find stack for package [joint_trajectory_action]).

Where should I get those dependency packages? I appreciate any pointers to get me started with pr2 simulator.

Thanks!