To install this package:

Apache
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1. Extract it in your web document root (for example /home/httpd/html/).

  $ tar zxf XPindex-<version>.tar.gz -C /home/httpd/html/

2. Add /XPindex/index.php to the DirectoryIndex line in your httpd.conf

  DirectoryIndex index.php index.html /XPindex/index.php

IIS
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1. Extract it in your web document root (for example C:\Inetpub\wwwroot\).

2.
  - Go to the IIS Admin, rightclick on the websites rootnode and choose for properties.
  - On the Custom Errors tab select the 403;14 error and click on Edit Properties...
  - Choose for the URL type and enter /XPindex/index.php as URL