I installed the script manually, copying the script file and csx folder to Photoshop's scripts folder.
Note that I am using a Japanese version of Photoshop, with the 'Photoshop Presets' and 'Scripts' folders named in Japanese.
Selecting CSX from the scripts menu results in a 9 second delay, before the error message appears.
I wonder if this is an incompatibility issue with Japanese Photoshop CS2?
The log file is attached.