This subject is what started the "Sony getting their asses handed to them on a platter" debacle last year. They released an update that disabled that feature on all of those older PS3's and pissed off a whole lot of people. Then, some guy published a workaround for that fix and Sony went after him with their legal guns blazing.
The group, "Anonymous" took over from there,....I'm sure that you read about that.
Google searching will probably find the info that you're looking for. Discussing it here goes against the rules we have at PureOC.