Im stuck on step 4....I have renamed the RUU downgrade to PG05IMG.zip and placed it in my removable disk which is my SD card. Ran the prompt adb reboot bootloader and when i choose bootloader on my phone it says something to the affect "wrong image or file" it wont accept the downgrade. Any idea of what im doing wrong? i have tried to re-download the downgrade again and had no success. any help is appreciated. thx