Thanks for your interest, but the plugin and documentation is still WIP, with quite a few bugs, and plenty of untested code. Check out http://sketchyphysics.wikia.com/wiki/LazyScript_Plugin for the latest documentation and release of the plugin, and http://sketchupusers.vacau.com/index.php to provide feedback, in the 'Ruby Scripting' section (I'm not active on this forum, nor is Mr. K)