IIS on Windows 7 / Vista / XP Pro

A project may propose using Webservices. So here I find how easy it is to enable IIS on Windows.

For Windows 7 / Vista, it is a build-in feature:
http://learn.iis.net/page.aspx/28/installing-iis-7-on-windows-vista-and-windows-7/
http://www.howtogeek.com/howto/windows-vista/how-to-install-iis-on-windows-vista/

For Windows XP Pro, it can be installed free:
http://www.webwiz.co.uk/kb/asp_tutorials/installing_iis_winXP_pro.asp