** Where do I install this directory in CalendarScript? **
Plug-ins get installed in the /calendarscript/plugins directory
** What privileges? **
It shouldn't need any changes as those files are not accessed directly from a browser but check what the test plug-in files and directory are and you could make the new ones the same.
** Do I need to do anything else? **
As with any plug-in, activate it. Go to the Calendar's administration section, click the 'Manage Plugins' link below 'Global Options' and enable the newly installed plug-in. I believe a new option will appear on the administration section's menus.
Dan O.
------------------