What others have said, older models maybe. Only unless you give it a shot.
That I think this ability doesn't work with new firmwares now, though.
Just hoping one day people will soon realise Sony products are not that great the way people think they are.
Sony is only interested in the money, if it means limiting you in terms of what you can do with your PS3 they will do it, they already screwed over the PS3 Fat users by removing the Linux OS install also.