Guided missile v2

Step1.Spawn
Step2.Target some crafts, including the moving ones, in about 3km, and a scale of not less than 10m
Step3.Activate group2 to fire, and stay focus on the missile. Don't switch to other objects or the missile will lose the guidance when you are not there. The missile will try to engage the target and launch dispensers to hopefully hit the target indirectly.

This is like what I've posted before, but has a considerably improvement on accuracy, while you might still miss a moving target.
Note that you may have to use slow-motion to improve the framerate so that the controlling program could run in a better condition, and you can observe whether to missile hits the target as intended.