i dont have visionlab, but i have used the demo before and i own effectslab pro and complab lite.
Idk how the lightning engine works in vision lab(i used after effects cs3 proffesional)
so first add the lightning bolts. The next step is to add lens flares and make them flicker using the brightness. Third you add the sparks in the middle(i made a preset right here)- http://fxhome.com/presets/view/1837/da-sparks
the tricky part is to animate and adjust the sparks so that they fade out just before they reach the area whey you them to look like they land. and the last part where the sparks hit the ground i got the idea from here,http://www.videocopilot.net/tutorials.html?id=35
only instead of using the in spatters, i used PAINT(the program) filled the background with black, and with the air brush i sprayed white dots across the black.