rospack find beginner_tutorials failing

edit

After doing a successful full desktop install of ROS Fuerte on Ubuntu Precise 64-bit, ( overlay too) I did:

$ roscd
$ roscreate-pkg beginner_tutorials std_msgs rospy roscpp    (this part worked)

then:

sam@Mecha:~/fuerte_workspace$ rospack profile
Full tree crawl took 0.022642 seconds.
Directories marked with (*) contain no manifest.  You may
want to delete these directories.
To get just of list of directories without manifests,
re-run the profile with --zombie-only
-------------------------------------------------------------
0.011132   /opt/ros/fuerte/stacks
0.010529   /opt/ros/fuerte/share
0.004067 * /opt/ros/fuerte/share/common-lisp
0.003998 * /opt/ros/fuerte/share/common-lisp/ros
0.002150 * /opt/ros/fuerte/share/swig
0.002037 * /opt/ros/fuerte/share/swig/1.3.29
0.001495 * /opt/ros/fuerte/share/doc
0.001454 * /opt/ros/fuerte/share/doc/pcl-1.5
0.001429 * /opt/ros/fuerte/share/doc/pcl-1.5/tutorials
0.001376   /opt/ros/fuerte/stacks/navigation
0.001299 * /opt/ros/fuerte/share/doc/pcl-1.5/tutorials/sources
0.000902   /opt/ros/fuerte/stacks/robot_model
0.000612   /opt/ros/fuerte/stacks/geometry_experimental
0.000593   /opt/ros/fuerte/stacks/image_pipeline
0.000474 * /opt/ros/fuerte/share/catkin
0.000450   /opt/ros/fuerte/stacks/geometry
0.000411   /opt/ros/fuerte/stacks/diagnostics
0.000398   /opt/ros/fuerte/share/ros
0.000387   /opt/ros/fuerte/stacks/vision_opencv
0.000371 * /opt/ros/fuerte/share/catkin/cmake

then: THIS IS THE PROBLEM:

sam@Mecha:~/fuerte_workspace$ rospack find beginner_tutorials 
[rospack] Error: stack/package beginner_tutorials not found

My .bashrc file in my home directory has the following source lines where I replaced one source line with another as prescribed in the installation instructions.... and executed . ~/.bashrc

# source /opt/ros/fuerte/setup.bash  <---this is commented out
source /home/sam/fuerte_workspace/setup.bash

The tutorial instructions say:

If this fails, it means ROS can't find your new package, which may be an issue with your ROS_PACKAGE_PATH. Please consult the installation instructions for setup from SVN or from binaries, depending how you installed ROS. If you've created or added a package that's outside of the existing package paths, you will need to amend your ROS_PACKAGE_PATH environment variable to include that new location. Try re-sourcing your setup.sh in your fuerte_workspace.

I didn't make any effort to " create or add a package that's outside of the existing package paths".

I don't quite understand how

"Please consult the installation instructions for setup from SVN or from binaries, depending how you installed ROS." helps me since I don't understand what's really happening here.

It seems that maybe the profile command should have listed my /home/sam/fuerte_workspace/ path?!....but I'm not sure.

Please advise.