Moving IIS setting from Windows Server 2003 to Windows Server 2008
The Microsoft Web Deployment Tool (MS Deploy) is a utility that you can use to migrate your Web server or Web site from a computer that is running Information Services (IIS) version 6.0 on Microsoft Windows Server 2003 to a computer that is running IIS 7.0 on Windows Server 2008.
You can find more detail of the tool in here:
http://www.iis.net/download/webdeploy
http://technet.microsoft.com/en-us/library/dd569059(WS.10).aspx