Hi,
If you are intrested in doing something yourself:Go to the Editor depot
First:Search and read a drop tutorial (Vektorboson)
Second: search for "Dialog drop" by Seedhe.
D/l,install in your users\missions folder,start SP editor in Desert Island.
You will see "Open Dialogue" in your menu.
Click it,you will have a dialog with all parameters of the drop command.
Under "shapename" pick Blesk1 ; "Type" pick billboard.
Press start,and U will already have some kind of lightning.
Play with all the other parameters till you have something U like
U can copy\paste the whole drop commandline from the bottom.
Put this line in a fast loop in a script,also attach your drop command (last parameter) to an object,(or give a startposition),exec your script with a trigger
Enjoy your creation