Sketchup Plugin Download
http://pages.cs.wisc.edu/~kponto/ds501/UWLEL_SketchupPlugin.exe
old version
http://pages.cs.wisc.edu/~kponto/ds501/UWLEL_SketchupPlugin-old.exe

1. Remember to enable your plugin 
2. You can modify properties by right clicking on objects
3. To save your models choose “File > Export to OpenSceneGraph > Export to LEL CAVE” and either choose osg or ive