1) I tried UniFlasher 2.0 to flash new "russian" firmware ... first I flahed my PRS505 with
official flasher to version 1.1.00.18040. Than I found on
the-ebook.com the patch with clock, joystick and fonts (,but original not localized menu) ... than I copied UniFlash2 on SD card and add new_opt.img ... started my reader and first clicked on 4 ... it writes that it copied it correctly, than I clicked on 6 and error come, that something "/tmp/... not found".
2) So I used "old" flasher from "hack3.zip" file and added new new_opt.img
---> my PRS-505 flashed correctly and works fine
Now I have new firm with clocks, font(czech font supported

) ... see attachment