motion trail follow path width

I am using motion trail for setting up a follow path for a car.
http://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Animation/Motion_Trail
Is it possible to show and set the width for the path the car followed.

Just like this:

Unfortunately its not possible with motion trail but no problem its an awesome add on.

Anyhow how can I view the animation path when I have not used follow path for example recording a moving cube with grab?