readynas pro business bios upgrade

in the install sctipt i found 

# grep -B2 biosflash install.sh 
#   - Todo: add check to only flash if newer.

ULTRA2BIOS=/opt/biosflash/RN_Ultra2_110211.ROM
ULTRA4BIOS=/opt/biosflash/RN_Ultra4_082311.ROM
ULTRA6BIOS=/opt/biosflash/RN_Ultra6_061010.ROM
NV6BIOS=/opt/biosflash/RN_NV6_072610.ROM
--

# // pre-flight checks
if [ ! -d /opt/biosflash ]; then
        echo " * missing BIOS images"; exit
fi
if [ ! -x /opt/biosflash/flashrom ]; then
--
if [ $DMI_BOARD = "ReadyNAS-NVX-V2" ]; then
        echo " * found Ultra 4 board, date: $DMI_DATE"
        /opt/biosflash/flashrom -c SST25VF016B -w $ULTRA4BIOS > /tmp/bios.flash
--
elif [ $DMI_BOARD = "FLAME6-2" ]; then
        echo " * found Ultra 6 board, date $DMI_DATE"
        /opt/biosflash/flashrom -c W25Q80 -w $ULTRA6BIOS > /tmp/bios.flash
--
elif [ $DMI_BOARD = "FLAME6-MB" ]; then
        echo " * found NV6 board, date $DMI_DATE"
        /opt/biosflash/flashrom -c W25x80 -w $NV6BIOS > /tmp/bios.flash
--
        echo " * found Ultra 2 board, date $DMI_DATE"
        # -c SST25VF016B | -c MX25L1605
        /opt/biosflash/flashrom -w $ULTRA2BIOS > /tmp/bios.flash

so 

NV6BIOS=/opt/biosflash/RN_NV6_072610.ROM

 is the correct firmware.

i can confirm the the upgrade and cpu work.