For this you would need 2 parts of a script. First part launches the scud, and the second would create an explosion.
The first part would look something like this:
scudname Action ["SCUD LAUNCH"]
~13
scudname Action ["SCUD START"]
I'm not sure about the length in between, but I think 13 should be enough.
The first command points the rocket upwards, and the second launches it.
Unfortunately, the rocket is just for looks, it doesn't actually do anything, so you'll need a second part to create the explosion.
It would look something like this:
_ammo = "LaserGuidedBomb"
_pos = getmarkerpos "bombmarker
_x = _pos select 0
_y = _pos select 1
_z = 50
_bomb = _ammo camcreate [_x,_y,_z]
You can change the following: the _ammo type, the marker name, and the _z position (height)
Note: the previous will only create one LGB. If you want a bigger explosion, then the script will need to be changed to create multiple ones.
Hope it works,
-=GC=-Fungus1999