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Install:
Drop the .jsxbin file and the folder 'AED_Groups' folder in the ScriptUI Panels
folder which is inside the Scripts folder.



  > > \Adobe\Adobe After Effects CS5.5\Support Files\Scripts\ScriptUI Panels

Restart After Effects and you will find script under the Window menu.
You can then dock it in your interface by drag and drop. 
It is designed to be docked on the left of the timeline panel.
See the video on Aescripts.com for a quick intro.

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Thanks! 
Filmmaking.com.vn