For Sytist to work on your hosting, your hosting must have the following features (which are very common):
PHP 5+ with safe mode off
MySQL 5+
MySQLi_ extention enabled
GD Library installed
If you are unsure if your hosting company meets the requirementst, download this zip file.
Unzip it to your computer and upload the included sytist.php file to your website. See the readme file for further instructions.