hmm, it seems to not work sometimes, and by the way, won't he download system updates and such? and maybe he doesent recon the game properly, and one more thing, wouldent that feature need psn and plus activation? just some thoughts that it might not work if you don't have a subscription?
If you have set up your dns settings in network settings, then when you start a game it will automatically prompt you if you want to download and install game patches. As far as AUTOMATICALLY downloading and installing.. well never come across that one before. Also, you don't need PSN access to download patches, they simply come down your net connection.