Its up to you but there are two way to do it.
1.) the trigger way, I've never used that before
bomb1= "laserguidebomb" camcreate (getpos marker1)
2.) Use a script like mine ( I hate advertsing my own script
)
And use the triggers to call it multiple times and just use markers or something. Like a whole bunch of triggers calling the script and since mine is generic, you just put in the target, ammotype(prolly shell125), height (maybe some shells hit ground, others airburst?) and there you go but you'd need a bunch of "targets" like markers or something.
But its up to you unless someone has something else..