How to show the bounds of sensors

can someone tell me, if it’s possible to show the bounds of a sensor.
I have a vehicle chasing a ball. It has 2 Radar-Sensors in front and turns himself according to the direction of the ball. (Does anyone know ‘MindRover’?)

How can i make the radar-cone visible in edit-mode?
(As with lamps)

[edit] stupid me, i can place a Lamp there, adjust the settings and copy them to the sensor [/edit]

Yeah this would be a nifty feature though.