.htaccess Redirect OLD index.php requests

If ($_GET("option")="variable1"){
echo Meta Refresh code here;
}else{
Standard MODx rewrite conditions
}

RewriteEngine On

RewriteCond %{QUERY_STRING} ^option=([^&;]*)$
RewriteRule ^index.php$ /modx/%1 [R,L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

# If your MODx installation is in a subdirectory, change the following line to match the physical
# path to the "root" of the site as follows:
# RewriteRule ^(.*)$ /path/to/subdirectory/index.php?q=$1 [L,QSA,NC]

RewriteRule ^(.*)$ /modx/index.php?q=$1 [L,QSA,NC]

# Compression
# and may also be optionally commented out.
php_flag zlib.output_compression On
php_value zlib.output_compression_level 5

#Rewrite On and SymLinks
RewriteEngine On
Options +FollowSymlinks

#Rewrite and redirect specific old URLs with 301 loaded for SEs
RewriteCond %{QUERY_STRING} ^option=foobar
RewriteRule ^index.php http://site.com/dir/specificpage.html [L,R=301]

#Force http://site.com rather than www. for non-duplication in SEs
RewriteCond %{HTTP_HOST} ^www\.site\.com [nc]
RewriteRule (.*) http://site.com/$1 [R=301]

#Check for existing directory or file
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

# Rewrite SE friendly URLs for MODx v3
RewriteRule ^(.*)$ /index.php?q=$1 [L,QSA,NC]