Custom particle system preview.

I have a component that acts as a custom emitter; when attached to an object with a particle system, it emits the particles in a specific pattern that can't be emulated with the built in particle system settings.

I'd like this custom emitter to show up when I preview the system in the editor. Is there anyway to override the default preview behavior?

Note: I'm using the new particle system (shuriken), not the legacy system.