Script help with Callbacks

[convolution223]

I'm really sorry for asking this, but I'm not a programmer. I don't understand how to use callbacks. There's 4 different types of callbacks for certain entities and the text fields in the level editor are making it more confusing than if i just had to type a function in the .hps. How do I use these? Any old example would do, I think. Unless they're all created in totally different ways.