sigh.... I was saving this for Full Circle... but its not a big deal, expecially since i made it so it works a little better, but this is the skeleton of it. put this in SSM.tbl
;; subspace missile strike definition
$SSM:
+Weapon:SomeWeapon
+Count: 5
+WarpRadius: 100
+WarpTime: 3
+Radius: 1000
+Offset: 1500
#end
Replace +Weapon with a weapon from your weapons.tbl, count is the number of missiles, warpradius is the size of the subspace portal, warptime is the amount of time between the deployment and the arrival, radius is the total cone that the missiles can enter through, offset is probably something to do with where the cone goes. Fire it with the targeting laser, but its buggy as hell.