Well here is a Root Package for Japanese PRS-T1, and a Restore Package. Let me know if they work for you. It's mostly the same as the Russian set, but I removed some of the stuff that shouldn't be needed in Japan, such as Russian Keyboard. I see. Now I tried to execute your commands in a Virtual Machine running Japanese Windows XP. When I execute the command, even if I execute only ebook_msc.exe,