Difficulty locating ~/ros_ws for baxter simulator install

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Hi,

I am attempting to install a baxter simulator following the instructions outlined here:

http://sdk.rethinkrobotics.com/wiki/S...

I cannot find the directory ros_ws - I have tried creating one but if I do and run the command:

./baxter.sh sim

I get the following message:

1) Please verify that this script is being run in the root of your catkin workspace

2) Please verify that your workspace has been built (source /opt/ros/indigo/setup.sh ; catkin_make)

3) Run this script again on completion of your workspace build.

I have run catkin_make previously and apparently 'built the workspace', but I do not know where it is located and where I should run this script and place ros_ws.

Any help would be much appreciated, thanks in advance.