hi Ken, Will you be okay if I were to add screen shots to this tutorial ? http://www.ros.org/wiki/stage/Tutorials/SimulatingOneRobot Regards, Arkapravo -- *Arkapravo Bhaumik* E-mail : arkapravobhaumik@gmail.com Website : www.mobotica.com Twitter : @abhaumik Facebook : arkapravo@facebook.com Skype : arkapravo