You will need winrar to extract the files, you can save the file anywhere. The best bet would be desktop.
-Go to the window where you pick East Asia Languages.
-Check the box.
-Hit okay or apply.
-A window should come up, hit okay.
-After you hit okay, another window will pop up.
-Goto the folder entitled LANG I believe, the file you're looking for should be the only one shown.
-Click the file then click okay.
-It will install and then ask you to find another file, it will either be in the LANG folder or the I386 folder.
-Hit okay then let it install.
-It should ask for another file, repeat the same steps.
-You should be prompted to restart your computer, do that.
-After that test lunia, it should work.
Rapidshare fans: Sorry no RS, doesn't work for me.
The servers aren't up, the east asia thing has been pretty much declared a hoax on the official forums.
Wait a bit.
While the servers aren't up you will need this to get to the login screen. Those people aren't very smart, you can tell because they have such poor english for people who claim to be ever so high and mighty, and they spam saying how "awesome" they are.
They claim some patch is coming that will rewrite the Japanese files into english. This is what probably isn't true, they(the GMs) will probably release a statement around 10AM eastern that you'll need such files.
This is what happens with most GnG games, dragon gem was hated by alot because it required such things. Ran online and Trickster had its share of complaints too.