Adding a new rear Laser Range Finder

I'm a Telecomunications Ingeniering and I need to add another rear laser range finder. Should I create a new array entity of Laser? What is the correct way. In my Handler, how can I diferentiate betwen the front and the rear laser.?

And another question is if there is a way to trail the path or way the robot follows in the simulation environment. I need information about the places visited by the robot.

Thanks a lot.

Daniel

[448 byte] By [Dalo_daniel] at [2008-1-9]