Brent Heinz of NextIT has released an installer packaging Shane Careveo's Fast-CGI ISAPI filter in conjuction with Ionic's Rewrite ISAPI filter and custom-written IIS scripts. The package allows easy deployment of Ruby on Rails applications on IIS 5.1 and IIS 6.0 (on Windows XP or Windows Server 2003).
The installer is compiled using the Nullsoft Installer System (NSIS). IIS setup is handled by Brian's vbscripts and executed from the installer. It installs the Rewrite filter, FCGI filter (including registry config settings), Ruby FCGI bindings and configures the IIS website.
Release 1.0 Beta of ROR4IIS is avaiable here.