Как правильно создавать White Label приложения на сайте?

<VirtualHost *:80>
	ServerAdmin webmaster@localhost

	DocumentRoot /var/www
	<Directory />
		Options FollowSymLinks
		AllowOverride None
	</Directory>
	<Directory /var/www/>
		Options Indexes FollowSymLinks MultiViews
		AllowOverride None
		Order allow,deny
		allow from all
	</Directory>

	ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
	<Directory "/usr/lib/cgi-bin">
		AllowOverride None
		Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
		Order allow,deny
		Allow from all
	</Directory>

	ErrorLog ${APACHE_LOG_DIR}/error.log

	# Possible values include: debug, info, notice, warn, error, crit,
	# alert, emerg.
	LogLevel warn

	CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

#user 'site-first' virtual host 'site-first.ru' configuration file
<VirtualHost 46.8.21.222:80>
	ServerName site-first.ru
	AddDefaultCharset off
	AssignUserID site-first site-first
	DocumentRoot /var/www/site-first/data/www/site-first.ru
	ServerAdmin webmaster@site-first.ru
	ServerAlias www.site-first.ru
	ScriptAlias /cgi-bin/ /var/www/site-first/data/www/site-first.ru/cgi-bin/
	<FilesMatch "\.ph(p[3-5]?|tml)$">
		SetHandler application/x-httpd-php
	</FilesMatch>
	<FilesMatch "\.phps$">
		SetHandler application/x-httpd-php-source
	</FilesMatch>
	php_admin_value sendmail_path "/usr/sbin/sendmail -t -i -f webmaster@site-first.ru"
	php_admin_value upload_tmp_dir "/var/www/site-first/data/mod-tmp"
	php_admin_value session.save_path "/var/www/site-first/data/mod-tmp"
	php_admin_value open_basedir "/var/www/site-first/data:."
	CustomLog /var/www/httpd-logs/site-first.ru.access.log combined
	ErrorLog /var/www/httpd-logs/site-first.ru.error.log
</VirtualHost>
<Directory /var/www/site-first/data/www/site-first.ru>
	php_admin_flag engine on
	Options +Includes +ExecCGI
</Directory>