well,
the short answer is:
the CoC_UA package has a ton of documentation for a whole mess of features.
To learn these, check out from the coc_arty zip file:
A) the "QuickHelp". This teaches you how to enable UA for human control.
B) The "missionediting" text file. This has a bunch of pointers, including how to have the AI fire stuff. If that doesn't answer your question,
C) The master CoC_Arty.doc file contains all the answers, just not in the most accessible format.
For your issue, I'd recommend CoCfIFCallFire. Of course, it will take some time for UA to init, and then some more time for the fire mission to be processed. But in principle, all you need is:
@CoCIFinit
[ArtilleryUnitName, [player]] Call CoCfIFCallFire
where artilleryunitname is the name of an artillery unit, goup, or AI manning it.
Dinger
dinger@thechainofcommand.com