Hi Sweetmusicman
The thing with the software updates (patches) is to sign into the PSN before loading the game and then if you havent got the latest it will tell you to install it, this is the version you see on the press any button to start screen)
There was 1 data pack (DLC) when the game first came out (boots and stuff) in the xtra content section that needs to be dowloaded to and there is also
PES shop items that you can purchase with your GP points ( physique 2 for example)
sorry if Im already telling you what you know, just thought I would try and help
With regards to installing the option file, if you have done all your copying when you get to the edit file, delete the edit file on your PS3 then copy the edit file from your USB stick.
If you still get the msg that the data is not yours, delete the edit file from the USB, copy back the edit file from the PS3 to USB, delete the one on the PS3 and copy back from the USB
this worked for me on the UK version, I would assume that the file picks up a root signature or something.