Blender Three.js (Display 3D Content on a Webpage)

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I got huge problems running this script.
I downloaded the script 2.5 Alpha 2 Version (latest) and tested it with blender 2.5 Alpha2 & 2.53.
I placed the .py file in the “…\scripts\io” folder.

But it doesnt show up in the export menu in blender…
I tried to install it manually (as an add-on) - didn’t work either. (didnt show up)
And I tried to run the script in text window - shows thousands of error-messages…

Anybody got an idea on how to run this?

I got Python 2.7 and 3.x(?sry I forgot the version number?) properly installed…