It's pretty easy to do with events, no need for plugins. But you'll have to explain in a bit more detail than that, there are many ways a projectile could be guided.
i want to be able to lock my aim on an the object i want to shoot..and then when fired...the projectile should follow the locked object and destroy itself and the object on collision.. i am trying to make a capx..let's see if i can get it on my own...i will keep checking here though :p