diff --git a/doc/rewrite.txt b/doc/rewrite.txt
index aed31c61..09d4b661 100644
--- a/doc/rewrite.txt
+++ b/doc/rewrite.txt
@@ -53,28 +53,19 @@ query-string.::
                        "^/link/([a-zA-Z]+)" => "/index.php?link=$1" )
 
 
-  # request:       http://www.domain.com/url/ 
-  # or request:    http://any.domain.com/url/ 
-  # before write:  /www/htdocs/url/
-  # after rewrite: /www/htdocs/domain.com/url/
-  # document-root=/www/htdocs/ %0=www.domain.com $1=url/
-  server.document-root = "/www/htdocs/"
-  $HTTP["host"] =~ "^.*\.([^.]+\.com)$" {
-    url.rewrite-once = ( "^/(.*)" => "/%0/$1" )
-  }
 
+  # the following example, is, however just simulating vhost by rewrite
+  # * you can never change document-root by mod_rewrite
+  # use mod_*host instead to make real mass-vhost
 
-  # request:        http://abc.mass-serve-subdomain.com/url/
-  # before rewrite: /www/htdocs/url/
-  # after rewrite:  /www/htdocs/mass-serve-subdomain.com/abc/url/
-  $HTTP["host"] =~ "^([^.]+)\.mass-subdomain\.com" {
-    server.document-root = "/www/htdocs/mass-subdomain.com"
-    url.rewrite-once = ( "^/(.*)" => "/%1/$1" )
-  }
+  # request:        http://any.domain.com/url/ 
+  # before rewrite: REQUEST_URI="/www/htdocs/url/"
+  # and DOCUMENT_ROOT="/www/htdocs/" %0="www.domain.com" $1="url/"
+  # after rewrite:  REQUEST_URI="/www/htdocs/domain.com/url/"
+  # still, you have DOCUMENT_ROOT=/www/htdocs/
 
-
-  # similar effect as above, except that you have multiply mass-subdomain now
   server.document-root = "/www/htdocs/"
-  $HTTP["host"] =~ "^([^.]+)\.(mass-subdomain\.com|mass-subdomain\.net)" {
-    url.rewrite-once = ( "^/(.*)" => "/%2/%1/$1" )
+  $HTTP["host"] =~ "^.*\.([^.]+\.com)$" {
+    url.rewrite-once = ( "^/(.*)" => "/%0/$1" )
   }
+