Did you ask the author of the script? CGI:IRC has a website http://cgiirc.sourceforge.net/. They even have a FAQ about running under Windows:

"It hasn't been designed to work on windows natively (eg: ActivePerl with IIS or Apache) due to use of unix domain sockets. Running apache and perl under the environment provided by cygwin is reported to work. This is only required of the server - nearly any web browser on nearly operating system should work as a client."

It is possible to change from Unix domain sockets to TCP sockets. Depending on the complexity of the software, it could be a lot of work.