HI Samuel,
Depending on the shot and the desired effect you can achieve this with combustion. If you have someone who can do this in 3D the end result could be better and your part will obviously be easier. It is very difficult to give direction and help with out seeing the shot.
I'm not sure how familiar you are with the particles in combustion but keep in mind your have control over each shape within the emitter and the control for the emitter itself that will affect all the shapes.
Later
Ken LaRue
combustion application engineer & discreet training specialist
http://www.thestreetproductions.com