Scaling effect is ignored when updating transforms. But it is possible, you'll just have tu use an attribute for that. Depending on what you're expecting, it will involve modifying timing, physics parameters, velocities, particles sizes, emission rate, etc.
Feel free to take a look at the "LOD.pkfx" in the "ReleaseHighlight" pack, freely downloadable from the editor. It is pretty much the same thing, but here, it is pluged in the layer script, and the particle change depending of it's relative camera position.
Let me know if this helped you,