See the improvement offered by the new Voronoi modifier, versus the old Fragmenter, in the new update for RayFire.
Max Cookie - Rayfire Introduction Tutorial
Max Cookie has released an introduction tutorial to the Rayfire plug-in for 3ds Max.
Create Rocket Plume Using 3ds Max Particle Flow - Tutorial
Pete Draper has a video tutorial on how to create rocket plume using Particle Flow in 3ds Max.