Need help with a script..

[ZeroFXSM]

I am working on a whole new concept of a bow and arrow. But first. since I am a newbie scripter, I cannot get what I want done. I have made grahpics for each thing.

Those who are familiar with the old script called "JF Targeting" know that once you hit D a targeter thing comes up. I want something like that. Where when you hit D, a target (which I already made) comes up. and when you hit D. it fires whatever to that target... (That can be worked out later..)

So any helpers? Or explain some code that could help me?

(I want the target visiable only to the player)

I don't want anyone to give me a script and say here. I want some key pointers. And don't just tell me "use this" for I have no idea what you may be talking about.