WordPress.org

Upload the xili-postinpost plugin to your blog, Activate it. Go to settings.

If you want to use widget, go to Widgets menu of Appearance menu.

To use shortcode inside post's content, refer to examples provided in these posts here.

To use core function of plugin, as developer, refer directly to code source before inserting (and echoing result) the function in your theme.

prerequisite

• a minimum of knowledges about queries (as end part of short link) like ?p=1 or ?cat=17&tag=new
• how are organized datas and semantic in the website.
• able to read WordPress Codex !
• for results formatting, some knowlegdges in html and class - xili-postinpost don't install style but is able to set html and class if option is enabled for widget or by adding params in shortcode.