ok make your self a sqs file and put this in it:
_x=getpos crate select 0
_y=getpos crate select 1
_z=getpos crate select 2
explo01 = "LaserGuidedBomb" camcreate [_x,_y,_z]
exit;
then put this in the trggers activation:
[] exec "filename.sqs"
replacing filename with whatever u named the file.
i just tested this and it worked fine, i made a ammo crate and called it "crate" and then ran it, it worked
cheers, Philly