Getting the regional settings right is one of the first things to configure in your image build. I’ve come across this issue many times in the Windows 7 and Vista forums. I’ve also seen solutions such as custom reg hacks and scripts, all a load of unnecessary hard work. If you configure MDT 2010 right then it will take care of it all for you.
For the Windows 7/Vista in the UK, edit the CustomSettings.ini file and add the following lines:
SkipLocaleSelection=YES KeyboardLocale=0809:00000809 UserLocale=en-GB UILanguage=en-GB SkipTimeZone=YES TimeZoneName=GMT Standard Time
With that done now, there is no need to edit the unattend.xml or enter the settings in the wizard. In fact the lines SkipLocaleSelection=YES and SkipTimeZone=YES will hide the panes during the Lite-touch deployment wizard.
For other country’s, you can get a list of:
Remember these settings can also be used as task sequence variables if you are supporting multiple regions. For Windows XP read my article here.