With this plugin you can make price comparison sites or affiliate sites
Yes, register there for free. When you have registerd you can import feeds and search for products. When you have filterd the feed you can generate values and paste this in wordpress. Please check the tutorials @ http://www.productfeedtool.com/tutorials.php
Yes, please check shirs.nl for a live example.
Yes we recommend to read the tutorials @ http://www.productfeedtool.com/tutorials.php first in order to understand how this works.