To download the Roulette Systems, click on the "Roulette System Name" link. The system is contained as a ZIP file extension. Windows 7 and above have a built-in Unzip utility to unzip the file.
For more information about how to Unzip a file, see this video link How to Unzip a file
NOTE: Additional Roulette Xtreme systems are posted on laRoulette.it website. Some of them are in Italian, but can easy be translated to English.