It might be helpful to see an example of what you are going for, as it is hard to imagine what the expected outcome is from a verbal description.
My first inkling would be to replace the layer emitter with a single particle image that has all those points. That way you just emit a single particle, brush-stroke style. Using a light as an emitter will make it easier to control, as you can move it however you want, including rotating it.
Kalleheikki Kannisto
Senior Graphic Designer