A new feature in Windows Vista makes it possible to configure international settings from the command line using an extension of the Regional and Languages Options Control Panel. For example, a network administrator may wish to mandate that all corporate computers in his international branch offices use the ISO standard date format (YYYY-MM-dd). By describing this property in an XML file, the network administrator can create script(s) to automate the configuration of the international setting(s) for any Windows Vista installation.
This command line method of configuring international settings requires Windows Vista. It is bundled into the intl.cpl binary that ships with the operating system.
Source : www.microsoft.com/