ok,here is a brief tutorial for my guard with lantern
Sorry for the bad english,but if anyone want to correct it.it will be appreciated

* create a guard , a lantern and some patrol points.
*select the guard then link it from Guard to Lantern with contains and
 change data to alternate.
*select the lantern.
 delete its renderer/light property
 add the renderer/dynamique light property then give it a value of 70
 add renderer / Has Refs --->true
 add Engine Features / Frobinfo and select "delete" for all the categories

That s all

Now,if u knock the guard,u can choose to move his body or to extinguise the lanterne.
Just 1 thing to note:
If u have the autosearch body on , it will automaticly take the lantern.
click again to destroy it.now u can take the body.
if autosearch is off,u can either take the body or destroy the lamp but u will notice a some probleme 
with the deplacement of the lantern while u move the body.
if anyone know how to fix it,it will be cool

Blutch