this is our server's config (the parts for php that is)
In the Load Module section:
<IfDefine HAVE_PHP4>
LoadModule php4_module modules/libphp4.so
</IfDefine>
In the Add Module section:
<IfDefine HAVE_PHP4>
AddModule mod_php4.c
</IfDefine>
And then in the Add Type section:
<IfModule mod_php4.c>
AddType application/x-httpd-php .php4 .php3 .phtml .php
AddType application/x-httpd-php-source .phps
</IfModule>
the last part might be the only part that you need, and you can actually try it with only the two AddType lines and leave the rest of it out if that works