Won't the instructions - h e r e - work, regardless of Vista version?
The answer is "No". You can try it yourself if you don't believe me. The menus and messages will remain in the default language of the DVD. The only way to change Home Edition is to buy a new DVD in the language you want.
Now my Mac, well, that's a breeze. I often change from French to Chinese to English and it is complete and correct. After I choose the language I want I just logout, login. Not even a restart is necessary. As a language teacher, I love this feature and on my budget, I love not having to pay extra. The DEFAULT installation of OS X (and there is only one "edition") has 15 languages. If you want to save drive space, you can uncheck as many as 14 of them at the time of installation.