I have made a particle emission system parented to a cube that is animated to do certain things, like a loop or a figure 8 for example. The main editing comes in the compositor. You render an image or animation, go to the compositor, (before you render an animation) and take the output of whatever speedster you want the lightning to be and put it in the output node. I hope many people get as much use out of this as they can. This of course, is not perfect, but with a little compositing, it can be really useful for a short-film, or animation. Hope you all enjoy!!!