Running Google 8 on a Mac 10.6.8 wish it were otherwise but I got what I got.

I'd like to 3D print a few voronoi sculptures but I need help installing ConicCurveInFace.rb and VoronoiXY.rb into SketchUp (Google 8). How do I install a .rb file when what I need is a .rbz ?

This voronoi article http://sketchucation.com/forums/viewtopic.php?t=46696 is great but I could use a newbie guide...thx