I asked that question on this forum...and the reply said you can add it on winnt.sif... like... [RegionalSettings] LanguageGroup=1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17 SystemLocale=00000404 UserLocale=00001009 InputLocale=0409:00000409,1009:00000409,0c0c:00011009,0404:00000404 InputLocale_DefaultUser = 0409:00000409 This is for Traditional Chinese (Taiwan). If you still want to add the other input code please refer to the microsoft site: http://www.microsoft.com/globaldev/referen...xp/xp-lcid.mspx