Before creating your RSS feed using the RSS block, you will need to
have a RSS Feed URL established for your website. Prestashops RSS feed
is http://www.prestashop.com/blog/feed/
If you dont know how to create a rss feed, follwo the instructions
here: http://www.downes.ca/cgi-bin/page.cgi?post=56 or
http://www.make-rss-feeds.com/making-an-rss-feed.htm
Now that you have your RSS set-up, let install the RSS module
Go to backoffice>>modules>>RSS products feed and click
install. Once installed you can click the "configure" text next to the
module
Enter the name (title ) of the this feed
Next enter the URL for the RSS feeds you want to include in your shop
Enter the number of messages you wish to have displayed
Click save
Please be aware that many sections are incomplete as this site is currently in middle of major update