1. Upload the GuestAv.png file to /application/assets/images/characters on your Nova install. Alternatively, log in to your site, go to 'Upload Images' and upload it as a character image.
2. Upload the /_global/ directory and its contents into the directory of the skin you want to add the infobox to.
3. Open the template_[section].php file for all sections of the skin you want the infobox added to.
4. Find the line <div class="nav-sub">. Paste the below line beneath it:

<div class="infobox"><?php include_once(APPFOLDER . '/views/' . $current_skin . '/_global/pages/infobox.php');?></div>

5. Open /[section]/css/main.css for all sections of the skin you want the infobox added to. At the bottom of the file, add this line:

@import url('../../_global/css/infobox.css');

6. Upload the file autoload.php to /application/config of your site (if you have any other mods which alter this file, then you will need to compare the two and merge the additions)

Modify the _global/css/infobox.css file if you wish to adjust any styles of the infobox, including setting its width to match that of your sub-nav.