Huh boy.
1. Start typing out After Effects and Action Essentials. You're confusing people by just putting AE. See Sean's post above.
2. I have no idea what you mean by "it's all one frame." Do you mean the flash only lasts for one frame? Of course it does. That's how long it's supposed to last. It's a muzzle flash.
3. When you say "it's in the wrong position (rotated)," are you saying that the flash is being viewed from the wrong angle? That can't be changed, because it's a 2D video clip. You have to find a muzzle flash that was filmed from the correct perspective.
4. Action Essentials 2 and the original Action Essentials are the exact same thing (pre-keyed video clips), so the documentation should be exactly the same.
5. You don't have to have After Effects to use Action Essentials. Any video editor will work.
With all due respect Noodle, I don't want you here. - Ratboy Productions