Thanks - I got it working :)
But I have not been able to get it to work for PHP files.
(HTML and TXT output is fine). Do you know how to
tell it to process PHP output?
I have the following in httpd.conf
# PHP Configuration
#---------------------------------------
# Old Way
##AddHandler php5-script php
##AddType text/html php
# New Way
# See:
http://www.php.net/manual/en/install.unix.apache2.php<FilesMatch \.php$>
SetHandler application/x-httpd-php
</FilesMatch>
<Directory "/web/">
...
#SetOutputFilter Sed
AddOutputFilter Sed html
AddOutputFilter Sed php
AddOutputFilterByType Sed application/x-httpd-php
#AddOutputFilterByType Sed text/html
#AddOutputFilterByType Sed text/plain
OutputSed "s/santa/father christmas/g"
...
</Directory>