So what you're wanting is to fire like Voyager was around 1:55-2:05, right?  If you watch, the ship fires from several arrays at several parts of the ship.  So you would need to fire, switch to a different subsystem of the ship and fire again, all at close range.  This would accomplish your goal.  Unfortunately, I don't think you have enough fingers to do this, the weapons won't fire that quickly, and the game engine won't accept that many commands at once.  It can't even handle a roll-pitch-yaw combination.  That's pressing Q-W-A for the non-aeronautical of you. ;)