http://bugs.calibre-ebook.com/wiki/recipeGuide_advanced
in this link a can find an example of parse_index, and is a good method to create a feed, a complete list of article.
So, now i try to use the parse index in two different way:
-) to override only the title (because lack in the feed, and because the other are correct (description, url, date)).
-) to create a complete feed with all real first page of newspaper.
the second way now is clear, but the first actualy not at all.