You can use a ditto call (
http://ditto.modxcms.com/tutorials/custom-rss-feed.html)
follow the instructions in the wiki.
Its all pretty simple, you just have to work out what the call for ditto will be, although it will require additional work as the call fetches all the [*content*] of the page.
I had to create chunks with page titles to be fetched, and ratings and etc. It all worked out pretty well.
Just make sure you exclude your RSS document as it will show the ditto call.
Here is the feed:
http://www.viriko.ru/articles-ru-feed.html
Here is the article:
http://www.viriko.ru/articles-ru-invest-in-property-in-limassol-cyprus.html
As you can see the rating is not there, and H1 tags are not present in the feed although they are there in the article. Also the bottom part of the article is not in the feed.
Basically I used tvs and included chunk calls in there.
If you need any more info, let me know.