After much search of how to change rss to rss2 in magento wordpress integration, i am unable to find recent_entries.phtml, i found a page that says
In the template/callouts/recent_entries.phtml, around line 26 change the feed address to yours:

1 http://www.yoursite/blog/wp-rss2.php

The problem is that, i dont have any folder called callouts under my app/design/frontend/default/theme11/template, and definately no page under wordpress called recent_entries.phtml

any help?