Unfortunately it didn't work.....froze up and scrambled.
Update: I did another factory set in System Recovery then discovered Sats 119 and 129 still said Sat 91 in the corner with blue bars still.
Even when LNB Power was off or on I then went down again to the line for LNB Frequency and saved both Sats as 00.00 which I hope will work with PVR this time.
I then rescanned channels for Sat 91 afterwards.
If this doesn't work for PVR I will let you know in