The Think Particle - Cloud Generator is an Xpresso preset built to generate pyrocluster clouds quickly and easily. It works with Mograph effectors and Thinking Particle Dynamics. We have built in wind, gravity, turbulence, collisions, and more.
Version 1.3 also has a new tool that allows you to render and sculpt clouds with Turbulence FD from http://www.jawset.com/ instead of using the slower, native pyrocluster option built into Cinema 4D.
As time goes on we'll add features to this product and send the updates your way!
Learn more about the preset at http://blog.thinkparticle.com/2013/03/particle-cloud-generator-1-2-released/
DISCLAIMER: This rig requires Mograph and Thinking Particles and was built in R14 but should work as far back as R12 at least. You currently need the STUDIO version of Cinema 4D to run this preset.