Installation:requirements
From PrometheusIPN Wiki
WEBSITE REQUIREMENTS
* PHP 5.4 or greater * A MySQL database * pdo_mysql extension enabled in your php.ini * cURL enabled in your php.ini * OpenID / OpenSSL
I recommend using gameswitchers.co.uk for webhosting as they're quite cheap and definitely meet the Prometheus requirements
Install instructions found here
LUA REQUIREMENTS
* The MySQLoo module from here or the tMySQL module from here