1, Copy the servers default php.ini to your home directory
2, Make the following directory in user home directoy and chown to user:user
3, Create a file php.cgi in cgi-bin with the following content
#!/bin/sh exec /usr/local/cpanel/cgi-sys/php5 -c /home/user/public_html/
4, Chmod +x php.cgi and chown
the file to user:user.
5, Add the following in the .htaccess.
Action application/x-httpd-php5 /cgi-bin/php.cgi