patches
how can i download a patch
when you turn on your Ps3, sign into an account, then scroll left on your xmb to Settings, and go as high up as you can go to System Update.
if your asking about patches, as in patches for games, just pop your disk in and before allowing you to play your game, it should give you a manditory patch download.
if your not able to download patches you might need an internet connection, my memory of downloading a patch for GTA4 isnt as good as it was a month ago, but i can asure you that if your not getting patches, and your not on an internet connection, that might be your problem. either that or you already have it =)