Multiblemultisite in subfolder

.htaccess

<IfModule mod_rewrite.c>
	RewriteEngine On
	RewriteBase /
	RewriteRule ^index\.php$ - [L]

	# add a trailing slash to /wp-admin
	RewriteRule ^(?:([_0-9a-zA-Z-]+)/?){0,2}wp-admin$ $1/wp-admin/ [R=302,L]

	RewriteCond %{REQUEST_FILENAME} -f [OR]
	RewriteCond %{REQUEST_FILENAME} -d
	RewriteRule ^ - [L]
	RewriteRule ^(?:(?:[_0-9a-zA-Z-]+)/){0,2}(wp-(admin|includes).*) wp/$1 [L]
	RewriteRule ^(?:(?:[_0-9a-zA-Z-]+)/){0,2}(.*\.php)$ wp/$1 [L]
	RewriteRule . index.php [L]
</IfModule>

sunrise.php

<?php #place this at wp-content/

if ( !defined( 'SUNRISE_LOADED' ) )
	define( 'SUNRISE_LOADED', 1 );

/* extendes url segmente to 2 */
add_action( 'site_by_path_segments_count', function (){ return 2; } );