This is not a good idea, because `sick_lms200.launch` is included from several other launch files in `kurt_bringup`. My suggestion: Create a [launch file arg](http://wiki.ros.org/roslaunch/XML#substitution_args) in `sick_lms200.launch` called `laser_frame_id` with a default of `/laser`, and include the file with that arg set to `/laser360` in `kurt360.launch` and `rotunit360.launch`.