If you have the latest SketchUp [version 8 or 2013], then under the menu item, Window > Preferences > Extensions you will have an 'Install from archive' button. That will install the contents of the selected RBZ file for you. Alternatively use that button to install the 'SketchUcation Plugin Store' Toolset [there are links in the Resources menu]... after that, then that tool will work within SketchUp itself, and it can download and auto-install plugins for you... as well as do many other useful things like managing plugins and extensions...

Thanks, Box. Knew it was something simple. Didn't see anywhere in tutorials, etc. that wireframe would keep the tool from working. One of those "Duh" moments.

hello and welcome. LOTS of woodworkers and craftsmen here, you're gonna feel right at home