1. Download this for PI Plus :
http://simplenas.com/download/orange-plus
2. Write to SD card
3. Download respective image from
http://www.armbian.com/download/
4. Write the OS to other SD card.
5. just replace the script.bin and uimage form /boot folder of armbian installed SD card and copy to Openmedia vault SD card.
6. It works and i have tested with ORANGE PI One.