Loading Portable SketchUp Plugins

At work I do not have admin access to the PC's but still wanted to use a number of SketchUp plugins. Fortunately, SketchUp is able to load plugins from any directory. This, along with a little-known command-line option allowed me to automate starting SketchUp and loading my plugins from a portable location.

I posted a small set of files at github.

I'm no Windows scripting expert, so if there's a better or more portable way then please let me know.