There has to be a way to do this as is. Even if you have to use the crappy browser on the system to download a patch and then run it. And for those without internet on the ps3 you should be able to DL the things put it on a USB drive and transer it.
I really do not believe it if they say it isn't possible when you are capable of DL stuff from the internet onto the machine. I am sure they can code something to patch the game from where it DLs to. Think outside the box, don't crawl in it and cry!