Just where would you get the information to update it from without the internet. The system can not be updated without it being downloaded and then loaded into the PS3. I'm not trying to give you a hard time it's just that you need the internet just to read this answer. Sony PlayStation network has a section devoted to system software updates and support. They have PC update method and Disc update method as well as system update method. A link to this information has been added under related links
I have another suggestion for an easy update method if you have a friend with a TV and a WiFi connection. Just take your PS3 over to there house and hook it up and download and update. Because after reading the other methods this seems much easier for someone without the internet. Also you will need the internet just to download the information.
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well you get a usb stick make a folder on it called ps3 all in caps then in that folder make another called update all in caps go to the Internet and download the one you want put it in the folder update unplug your usb plug it in your ps3 go to system update go to from media accept the terms and conditions install it after 4 beeps your ps3 will restart now you have a jailbroken ps3 :D
Actually no
you need to update the system. then it will install the new update. or it could be the smudges on the disk
no the PS3 can not go backward to an earlier configuration after an update like you can a pc
See related link for help setting up the PS3 internet connection