Hmmm, I remeber having written a script called General Artillery Script (Snypirs new MP/SP Arty Script should be better) that can create one single flare, in a height you choose. The only thing that isn't realised is the onMapClick.
(The General Artillery Script ...geeez I wrote that over a year ago, those were the times, can spawn any type of object, if you want alos Artillery delivered Abrams, wouldn't be realistic but also possible, I gather the new MP/SP Arty Script from Snypir can also do that)
-Fishion