RewriteRules for Symfony 1.4 running IIS6 with IIRF

Question

I need some help translating the following mod_rewrite rules from a .htaccess file to IIRF (iirf.codeplex.com) format:

  RewriteEngine On

  # uncomment the following line, if you are having trouble
  # getting no_script_name to work
  RewriteBase /

  # we skip all files with .something
  RewriteCond %{REQUEST_URI} \..+$
  RewriteCond %{REQUEST_URI} !\.html$
  RewriteRule .* - [L]

  # we check if the .html version is here (caching)
  RewriteRule ^$ index.html [QSA]
  RewriteRule ^([^.]+)$ $1.html [QSA]
  RewriteCond %{REQUEST_FILENAME} !-f

  # no, so we redirect to our front web controller
  RewriteRule ^(.*)$ index.php [QSA,L]

Thank you in advance.