How to install exporter script in Blender 2.66

Hello guys,
I google everywhere but I cant seem to find the answer.(Or maybe I’m blind. If I’m blind how can I post this? hmmm)
I’m wondering if anyone can help me with this.

Question
How to install exporter script in Blender 2.66?

You can open scripts in a blender text window and use the Run Script button or istall as an addon in the User Preferences / Addons panel.
http://wiki.blender.org/index.php/Doc:2.6/Manual/Extensions/Python/Add-Ons