[TomTom]

192 //func_explosive{ spawn { remove } death { remove }}????!

Are you confusing the 2 methods?

If you use the func_explosive entity number you need to place the code inside the game_manager like

 game_manager
 {
     spawn
     {
        barrierRemove
       {
           173 //192? the entity number of the barrier to remove
       }
 ...
     }
 ...

To use the second method you need to find the name that follows "scriptname" for the entity in the bsp file

(I doubt very much that func_explosive is used like this;

{
...
"scriptname" "func_explosive"
...
}

or that this;

{
...
"scriptname" "192"
...
}

is used in the bsp. PLEASE Check the bsp again!)

If you can't handle the bsp then stick to barrierRemove method.