Well make a small trigger and have activated by someone, then in the activation field put
mine1 = "Heat125" camcreate (getpos nameoftrigger)
and then name the trigger to.
OR
I've tried using "this", but with mixed results.
mine1 = "Heat125" camcreate (getpos this)
Sometimes it works and somtimes it doesn't. Maybe its cause "this" is being used somewhere else...
EDIT: I should have clarified. The first way to do it is longer cause you have to match the code with different trigger names and stuff, I did it once for a small 15 mine minefield, a little annoying.
The second way is less finger labor, but I dunno if it works. :-\