[Radiant] how to install an extension?

[Daniel Sheppard]

> rb:266:in `load_missing_constant': uninitialized constant 
> ExternalRssExtension (NameError)

I'll hazard a guess that external_rss isn't actually the name of that extension. 
If it was, there would be an external_rss_extension.rb file in the root dir of 
the extension, which would be responsible for defining ExternalRssExtension.

Extensions are sensitive to being located in a correctly named directory. The 
directory should be named the same as the xxxxxx_extension.rb file in the root 
dir.

Dan.