you can script it using the drop comand,
this is a good particle to use for black
drop ["cl_basic", "", "Billboard", 5, 2, [0, 0, 0], [0,0,0], .5, .11, 1, .3, [.3,4],[[0,0,0,.3],[0,0,0,0]],[0],0,0,"","",_pos]
you put that in your config i think
where _pos is put the position you want the particle to apear the particle will last 2 seconds