Unused argument problem when launching /etc/ros/openni_head.launch on PR2 Hydro

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When I tried to launch the OpenNI Kinect driver on PR2, I do:

roslaunch /etc/ros/openni_head.launch

And then I got the following error message:

unused args [name] for include of [/opt/ros/hydro/share/openni_launch/launch/includes/manager.launch]

Nothing was started.

Here is the openni_head.launch file. I think that the problem is from line 47~50:

  <include file="$(find openni_launch)/launch/includes/manager.launch">
    <arg name="name" value="$(arg manager)" />
    <arg name="debug" value="$(arg debug)" />
  </include>

After I omitted the line "<arg name="name" value="$(arg manager)"/>", I get another error:

[FATAL] [WallTime: 1381238959.313747] manager.launch has moved to rgbd_launch! Replace "$(find openni_launch)/launch/includes/manager.launch" with "$(find rgbd_launch)/launch/includes/manager.launch.xml". This notice will be removed in ROS Indigo
[FATAL] [WallTime: 1381238959.424237] device.launch has moved to openni_launch! Replace "$(find openni_launch)/launch/includes/device.launch" with "$(find openni_launch)/launch/includes/device.launch.xml". This notice will be removed in ROS Indigo
[FATAL] [WallTime: 1381238959.470131] processing.launch has moved to rgbd_launch! Replace "$(find openni_launch)/launch/includes/processing.launch" with "$(find rgbd_launch)/launch/includes/processing.launch.xml". This notice will be removed in ROS Indigo
================================================================================REQUIRED process [manager_deprecated-1] has died!
process has finished cleanly
log file: /home/pr2admin/.ros/log/29e33790-3011-11e3-9aea-001517ebc33d/manager_deprecated-1*.log
Initiating shutdown!
================================================================================

Then I followed the instruction and replace "$(find openni_launch)/launch/includes/manager.launch" with "$(find rgbd_launch)/launch/includes/manager.launch.xml".

Here's another error I got:

included file [/opt/ros/hydro/share/rgbd_launch/launch/includes/manager.launch.xml] requires the 'name' arg to be set

Okay...let's add it back again. And then I got another error:

included file [/opt/ros/hydro/share/rgbd_launch/launch/includes/manager.launch.xml] requires the 'num_worker_threads' arg to be set

Well...can anyone provide a workable launch file for running Kinect driver?

My PR2 is running on ROS Hydro. Thanks for any help~