Need to update ReadyNAS ultra 2 due to SMB1 vulnerability!

Hi everyone!

I'm planning to use my old NAS again but because of security issues with SMB1 I find that microsoft have rendered it useless, which ofcourse is a good thing! I have tried to find a guide how to do this but seems to be unable to. Though unsupported by netgear I have been led to belive it should work to run OS6 if I upgrade from 

My bios --- 09/08/2010 ReadyNAS-ProUltra2 V1.4  --- upgrade using BIOS_Update_Package_0.5-x86.bin

My software --- RAIDiator!!version=4.2.30 --- upgrade using PREPR4TOR6_0.1-x86.bin

This is all fine and good, I have found a guide upgrading software BUT everyone seems to point out that I really should upgrade BIOS before this. And for the life of me I can't figure out how:), therefore I hoped someone here could help me. The easiest way should be to use an existing addon, if there is one ofcourse. I have found this: Enable Root SSH Access --- but I am not familiar how to use this. I also found some code, see below, but this seems to apply to a different model with different software! I am afraid to brick my NAS because of user error so I ask more experienced people here :)

# apt-get update
# apt-get install dmidecode flashrom
# cd /tmp
# wget http://www.readynas.com/download/addons/x86/4.2/BIOS_Update_Package_0.5-x86.bin
# dd if=BIOS_Update_Package_0.5-x86.bin bs=16k count=1
# dd if=BIOS_Update_Package_0.5-x86.bin bs=16k skip=1 | md5sum -
# dd if=BIOS_Update_Package_0.5-x86.bin bs=16k skip=1 | tar -xv
# tar -xvf files.tgz
# ls -lah /tmp/opt/biosflash
# flashrom --programmer internal -c SST25VF016B -w /tmp/opt/biosflash/RN_Ultra4_082311.ROM

 Can anyone help me or steer me in the right selfhelp direction? Much appreciated ...

Regards John