[flexcoders] Getting a Third-Party Component into Builder 2?

[Bruce H. Johnson]

I downloaded a neat-looking speedometer chart component in a zip file.
I can extract with the directory structure (GaugeComponent\Gauge... etc.)

Now, how do I get Builder 2 to recognize the sucker is there? I've
tried File > Import..., pointing a Source Path at it, etc. I've spent
a couple hours in Builder Help so I'm obviously asking the wrong question.