That's a rather complex image. Do you mean the entire thing or just one of the effects in the image (and if so, which one)?
Sorry for the delay.
Just the general concept.
Well, what you have are a bunch of shapes or images, with varying transparencies and blending modes.
You might check out this tutorial: http://vector.tutsplus.com/tutorials/designing/creating-fading-light-vectors-in-fireworks/
I found a couple of lists of Fireworks tutorials, see this thread: http://forums.adobe.com/message/2182475
Check the tutorials that deal with drawing vector shapes and making collages.