On a LAMP stack I was able to use:
> php_value auto_prepend_file bootstrap.php
in .htaccess to bootstrap a bunch of commands that I wanted to execute before any page was ever processed.
Is it possible to do the same in IIS 6.0 ?
UPDATE: Not the prettiest solution, but since I have one site on this server I just added the auto_prepend_file setting in php.ini and restarted IIS