server.modules = ( 
     .....
            "mod_fastcgi",
     .....
 )
     .....
$HTTP["url"] =~ "^/thetis($|[/])" {
  server.document-root = "<ご自分の環境のパス>/thetis/public"
  alias.url = ( "/thetis/" => "<ご自分の環境のパス>/thetis/public/" )
  server.indexfiles = ( "dispatch.fcgi" )
  server.error-handler-404 = "/thetis/dispatch.fcgi" 
  fastcgi.server = ( ".fcgi" =>
    ( "app-1" => ( "host" => "127.0.0.1", "port" => 7000 ),
      "app-2" => ( "host" => "127.0.0.1", "port" => 7001 ),
      "app-3" => ( "host" => "127.0.0.1", "port" => 7002 ) )
  )
}
     .....

server.modules = ( 
   ...
#>> Thetis add 
            "mod_rewrite",
            "mod_redirect",
            "mod_scgi",
#<< Thetis add 
   ...
 )
   ...
#>> Thetis comment out 
  ▼ この行をコメントアウト
# dir-listing.activate        = "enable"
#<< Thetis comment out 
   ...
#>> Thetis add 
$HTTP["url"] =~ "^/thetis($|[/])" {
  server.document-root = "<ご自分の環境のパス>/thetis/public" 
  server.indexfiles = ("frames/index")
  alias.url = ("/thetis" => "<ご自分の環境のパス>/thetis/public")
  server.error-handler-404   = "/thetis/dispatch.scgi" 
  scgi.server = ( "dispatch.scgi" => (( 
    "host" => "127.0.0.1",
    "port" => 9999,
    "check-local" => "disable" 
   )) )
  scgi.debug=3
}
#<< Thetis add 
     .....

@echo off
echo Stopping SCGI Service...
taskkill /F /IM ruby.exe > nul
cd <ご自分の環境のパス>\thetis
echo Starting SCGI Service...
scgi_service
exit

SCGI（scgi_rails-0.4.3）をお使いの場合、Rails2.0.x以上だとSCGIの起動時にエラーになります。 　C:\ruby\lib\ruby\gems\1.8\gems\scgi_rails-0.4.3\bin\scgi_service 　（パスはRubyのインストールディレクトリにより異なります） の36行目 ActiveRecord::Base.threaded_connections = false をテキストエディタで次のように編集して下さい。 ActiveRecord::Base.allow_concurrency = false