Ok, I'm going to try and be as specific as possible.
I'm making a building that can launch missiles. The missiles train like a normal unit. I want the missiles to move to the rally point of the building, but I don't want them to change course if you change the rally in mid flight. When the missiles reach the designated destination, they blow up causing AoE damage to everything in radius and obviously die themselves.
All I have is a tower that I want to "shoot", a unit that uses a missile for a model(the one thats going to explode), and an ability based off of kaboom![/code]