Show hovercard with "last poster avatar" plugin

Yes, you can't duplicate a plugin, you'll have to edit the original version. I still haven't had a look at the plugin though, sorry.

Hi, I’ll install the plugin this evening now that I’ve got some free time.

Here are the culprits:
1) disable "Modal box Popup" settings from Avatarep settings;

2) inc/plugins/avatarep.php, line 726, find:

$user['avatar'] = '<div class="avatarep_fd">' . $user['avatar'] . '</div>'; 

Replace with:

$user['avatar'] = "<a data-uid='{$user['uid']}' href='{$avatar['profilelink']}'>" . $user['avatar'] . '</a>'; 

3) inc/plugins/avatarep.php, lines 704-706, find:

}else{
    $user['avatar'] = "<a href=\"". $avatar['profilelink'] . "\" title=\"".$user['avatarep_title']."\">".$user['avatar']."</a>";
} 

Replace with:

} 

Basically the last step is just a removal of everything after "else".