SketchyPhysics, the plugin for Google SketchUp, was implemented entirely by Chris Phillips in his free time. Neither Google, nor the group that made the physics engine was involved. It was an admirable effort, and we applaud Chris for giving such a powerful plugin out for free! This Wiki is being constructed by fans of SP, to help new users and show old ones some new tricks. Chris doesn't have the time to create documentation, so it's been somewhat lacking in the past; this is hopefully the answer.