I got another way to do it, very similar anyway.
Call the tank somethin, we will call it "Target" for example and then create a trigger activated by the side of the tank you want to blow up, lets say East, and then in the on activation field of the triger type this:
b1="laserguidedbomb"camcreate getpos Target
right, Laserguidedbomb you can change it to whatever you feel like, even a hand grenade if you just want a soldier to die, camcreate is telling the game engine to camcreate what you allready put in there, in this case the Laser Guided Bomb, then the one important thing too is the getpos, this is where the bomb is going to be created, in this case is going to be the tank you want to blow up, Target is the name you put in the "name" field of the Tank's creation window so to make sure the bomb is created in the right place.
Now when your tank call Target or whatever you want to call enter in the triger it will get blowed up.
My sugestion is for you to try with diferent tipes of explosives and see what hapend then.
Later.
@CERO