Regional and Language Settings.

Hi guys, Need some help here.
I tried to change my Language for non-Unicode programs to Chinese (Taiwan), but it keeps popping out a dialog saying ''Setup was unable to install the chosen locale, please contact your system Administrator.' And I am the admisnistrator. What is going on? Why i cant change it? Can anyone help? Thx in advance.

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Check here for some info on this:

http://newton.uor.edu/Departments&Programs/AsianStudiesDept/Language/asianlanguageinstallation_XP.html