changing the ini from a file

I'm using .htaccess to do php_value auto_prepend_file "auth.php" The problem is that there are very specific files that I want to be able to NOT run that in. I guess I could just move them to a directory and use .htaccess to perform a php_value auto_prepend_file "" But I was hoping to not have to make a separate folder for that. Anyone encoutered being able to change/disable the setting on the fly in a specific file? Thanks! Wolf