if you want'em to glow dude, just make the sparks on a separate layer, and then right click the layer in the tool box, and select Blending Modes (this is for 6.0, and it might not be called blend modes, cuz I cant remember it exactly right now, tho its something along that line). After that, select outer glow, and set your parameters, its real time previewing so u can see what its gonna do.