I was finally able to insert a template. Xml, after many failed attempts. Only problem: it is missing the top navigation bar (the one where there were links management and the new blog post).
I have no idea at the time, how to put them back without resetting a default graphics. Waiting for someone to come to the aid I inserted in the menu a link to the page where you can make new posts (fortunately saved in memory). For the moment we use these links, you should go. Thanks and hello!
