This should work, but I definitely recommend NOT to use any 5.9.x fw version for PW3. Get the update to the last 5.8.x series version from Amazon (v5.8.11) and install this locally via UYK command:
https://s3.amazonaws.com/firmwaredow...ite_5.8.11.bin
Don't forget to reinstall all your hacks ... but surely you already knew this...