i want to use simplepie to scrape rss feeds of products on other sites like craigslist or ebay and be able to add stuff to the feed. like for example if i am displaying an rss feed for iphones from ebay i would like to add an affiliate link for a free iphone offer on each item it displays. this is just an example as i have many ideas on how to use this. i have been reading the simplepie documentation and it seems to be a wonderful and highly customizable product but i have not found anything specific on this. just wondering if this is possible.