dummy units to cast sutom spells

Basically I'm trying to get starfall to be a rapid-barrage style thing - along the lines of 4 damage per fall, 10 a second for 5 seconds, or something like that, just because it would look pretty and fit with the theme. I've given up trying to modify the spell to actually attack that frequently, I could never get it to work and I don't know why - the same thing happened when I tried to modify monsoon as well. Now what I've done is created a dummy unit to cast the same level starfall with small time intervals when the character cast his own starfall. However I cannot get the dummy units to cast the custom spell, I simply cannot find the trigger/know if it exists. All I want is for the dummy units to cast my version of starfall. Am I going to have to modify starfall so that it has the require damages, or is there a way to do this?

are u saying u made a new one? if u did, then u should just go back to original starfall and edit it to what u want, then the action is
unit > issue order with no target
order (unit variable for dummy) to (night elf priestess of the moon starfall)

I got that order - so people are saying that there is NO way using just the world editor to order a dummy unit to cast a non-base spell, and I have to make it cast the original? If so, is there any way at all using some other form of editing?

If you have a spell based on another spell, then just issue the order to cast the base spell. That will work.

So the <order unit to cast <POTM starfall>> can be made to cast different levels of starfall, or do I need to create more units casting the same level 1 spell to get the correct damage? I find it ridiculous that there isn't a trigger along the lines of <order unit to cast ability - [x]> hell, even <order unit to cast ability in location <what ever the co-ordinates of the skill is> would be useful. How have other people overcome this problem? I'm sure I'm not the only one trying to do this. I can see a way with triggers and channeling spells, but that would take a while to make, and a long if, but I'll have to settle for that I think.

You can use Order unit to cast starfall ... when you have:
a)A unit with the Starfall ability (no matter the level)
b)A unit with a ability based on Starfall

I think that is not necesary to use a dummy unit to make more damage, only make another level of your starfall ...That of course if i understood your question good (I prefer the spanglish lol)

I've just realised something - how does the game order the unit to cast the ability, does it tell the unit to activate the order string of that spell, in the which case I'm fine, and I've been dopey. Or does it do something else?