The link that you posted is broken...could you possibly post up a new one? I'm on Windows 7 Home Edition and I've been having problem setting the language on my computer to Japanese, or really, just installing a Japanese language pack in general.
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wohoooo... This is a year late but thanks to this I found the new one. Here! Setting Non-Unicode Programs - Windows 7 I hope this link helps me too. Haven't tried for a game yet.