Как правильно настроить 301 редирект для Wordpress, чтобы работала админка?

Question

[Вадим Ремин]

Добрый день,
заменяю сайт с MODx на WP. На прошлом сайте был настроен редирект c ibtwo.ru на assets.bibic.com (имена сайтов ненастоящие) таким образом:

# MODx supports Friendly URLs via this .htaccess file. You must serve web
# pages via Apache with mod_rewrite to use this functionality, and you must
# change the file name from ht.access to .htaccess.
#
# Make sure RewriteBase points to the directory where you installed MODx.
# E.g., "/modx" if your installation is in a "modx" subdirectory. If you have
# problems with your .htaccess working at all, try un-commenting the first 
# line above the "RewriteEngine On" directive.
#
# You may choose to make your URLs non-case-sensitive by adding a NC directive
# to your rule: RewriteRule ^(.*)$ index.php?q=$1 [L,QSA,NC]

AddDefaultCharset UTF-8

#Options +FollowSymlinks
RewriteEngine On
RewriteBase /


# Fix Apache internal dummy connections from breaking [(site_url)] cache
RewriteCond %{HTTP_USER_AGENT} ^.*internal\ dummy\ connection.*$ [NC]
RewriteRule .* - [F,L]


# Rewrite www.domain.com -> domain.com -- used with SEO Strict URLs plugin
#RewriteCond %{HTTP_HOST} .
#RewriteCond %{HTTP_HOST} !^example-domain-please-change\.com [NC]
#RewriteRule (.*) http://example-domain-please-change.com/$1 [R=301,L]
#
# or for the opposite domain.com -> www.domain.com use the following
# >>> DO NOT USE BOTH THE ABOVE AND BELOW <<<
#
#RewriteCond %{HTTP_HOST} .
#RewriteCond %{HTTP_HOST} !^www\.example-domain-please-change\.com [NC]
#RewriteRule (.*) http://www.example-domain-please-change.com/$1 [R=301,L]

RewriteCond %{HTTP_HOST} !^assets\.bibic\.com [NC]
RewriteRule (.*) http://assets.bibic.com/$1 [R=301,L]


# Rewrite secure requests properly to prevent SSL cert warnings, e.g. prevent 
# https://www.domain.com when your cert only allows https://secure.domain.com
#RewriteCond %{SERVER_PORT} !^443
#RewriteRule (.*) https://example-domain-please-change.com.com/$1 [R=301,L]

#Redirect /en http://ibtwo.ru

# The Friendly URLs part
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]

#Redirect /en http://ibtwo.ru
#RewriteEngine On
#RewriteCond %{HTTP_HOST} ibtwo.ru/en^
#RewriteRule (.*) http://www.ibtwo.ru/$1 [R=301,L] 


# Make sure .htc files are served with the proper MIME type, which is critical # for XP SP2. Un-comment if your host allows htaccess MIME type overrides.

#AddType text/x-component .htc



# If your server is not already configured as such, the following directive
# should be uncommented in order to set PHP's register_globals option to OFF.
# This closes a major security hole that is abused by most XSS (cross-site
# scripting) attacks. For more information: http://php.net/register_globals
#
# To verify that this option has been set to OFF, open the Manager and choose
# Reports -> System Info and then click the phpinfo() link. Do a Find on Page
# for "register_globals". The Local Value should be OFF. If the Master Value
# is OFF then you do not need this directive here.
#
# IF REGISTER_GLOBALS DIRECTIVE CAUSES 500 INTERNAL SERVER ERRORS :
#
# Your server does not allow PHP directives to be set via .htaccess. In that
# case you must make this change in your php.ini file instead. If you are
# using a commercial web host, contact the administrators for assistance in
# doing this. Not all servers allow local php.ini files, and they should
# include all PHP configurations (not just this one), or you will effectively
# reset everything to PHP defaults. Consult www.php.net for more detailed
# information about setting PHP directives.

#php_flag register_globals Off



# For servers that support output compression, you should pick up a bit of
# speed but un-commenting the following lines.

#php_flag zlib.output_compression On
#php_value zlib.output_compression_level 5



# The following directives stop screen flicker in IE on CSS rollovers. If
# needed, un-comment the following rules. When they're in place, you may have
# to do a force-refresh in order to see changes in your designs.

#ExpiresActive On
#ExpiresByType image/gif A2592000
#ExpiresByType image/jpeg A2592000
#ExpiresByType image/png A2592000
#BrowserMatch "MSIE" brokenvary=1
#BrowserMatch "Mozilla/4.[0-9]{2}" brokenvary=1
#BrowserMatch "Opera" !brokenvary
#SetEnvIf brokenvary 1 force-no-vary

У нового сайта на Wordpress .htaccess выглядит так:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress

Если просто заменить Wordpress-овский .htaccess старым, то сайт работает, все ридеректы совершаются, но невозможно зайти в админку, после ввода имени пользователя и пароля мы никуда не переходим.

Вопрос: как правильно совместить эти два .htaccess?
Я мало что понимаю в настройках .htaccess, но буду учиться, а пока мне просто нужна оперативная помощь.
Заранее огромное спасибо!