I am sure that the 7600.16385.090713-1255_x64fre_client_langpacks_1-GRMCXLP1_DVD.iso are the MUI interface languagepacks but couldn't find it yet
There's no new information about MUI's at this moment You can use the old one (Build 7264) or wait for new MUI's. I can't wait and I hope it won't last too long.
there is some info on wzor page, but I dont understand. And its in a picture, so cant copy to a translator
Zukona has a very slow connection.. but was able to share the RTM iso but he cant share the language packs... god