I just updated the firmware for my RP62, everything went very smoothly. It updated from 051 to 073.
When you load the CD in the player, the menu comes on the screen asking if you want to update the firmware. You click yes. It takes about a minute or minute and half. A red bar is created on the top on the screen. Then it says updated completed.
I played couple of DVDs after setting the menu for 16:9 etc. It plays fine, I havent tested for PQ difference yet. I will do that later tonight.
All in all, many thanks to Sango, he has been helping me thru AIM relentlessly. He is the hero for the Panny firmware update.