>If your server is PHP-enabled, you can create a pathinfo.php
>file. Open a plain text editor, and paste in the following:
>
><? print $PATH_TRANSLATED; ?>
>
>Save the text file as pathinfo.php (make sure your editor
>does not add a .txt extension automatically).
>
>Upload the file to your server in ASCII mode to a location
>outside of the cgi-bin.
>
>Now, type the URL to the file you just uploaded into your
>browser to view the full server path to that file.

The code above didn't work for me, but this one did:

<?php echo realpath(dirname(__FILE__)); ?>

Calvin