Kannagi no Tori installation help?

There are 3 RAR. When I click the setup in RAR1, the language is gibberish. But sometimes it happens so I don't mind it and chose the middle button. However after a while, there's an error (which I can't read because of the gibberish words)

I have vista OS and language set to japanese already. Please help?
Sorry if I made any mistakes by posting this.. ><

Are the RAR archives splitted or independent?
You probably have to extract them all and then launch the setup.

I think it's independent. But there are 3 of them. I already extracted all of them before clicking the setup but I still have the errors ><

Can you please post the archives names and a screenshot of your issue?