This should work:
1. Make an identical fuel truck "truck2" that has the same azimuth. Place it far away in a safe place on the map.
2. In your script, after cam creating the bomb, set pos the original truck to 0,0,0, and then setpos truck2 the original position of the fuel truck. (Remember to getpos the original truck's position before setposing it to 0,0,0).
3. Then setdammage 1 on truck2 so its smoking.
You might have to play with a little delay after the bomb camcreate to insure that the truck2 does not get launched by the explosion.