perhaps you can supply link for Vader rom?
What is your device?
Little more info would help, helping you
found the thread, its clear how to flash
● Flash by PC Odin correct 5.1.1 bootloader and modem
● Download and copy rom to internal sdcard
● Enter to recovery through a combination of keys HOME- POWER - and VOL UP BUTTON
● Make a backup of EFS partition ! (optional but very important)
● Select the rom and run the installation
● Reboot & enjoy!
The reason you dont get respons is because the thread is discontinued by the dev, so no more support and updates..