What you need:
2 USB Flashdrives 4 GB or more
2 PS3 Controllers and Charging cords
A CD Disk or an EARLY PS3 game 2007 etc.
It is very useful to FORMAT your USB's from now on.
First on one of your flashdrives, You will need OFW 3.21, Found here: downloads.exophase.com/634/ps3-firmware-
Your second USB will contain your desired frimware,
Whether that firmware is 3.41, 3.55, or 3.56. Just put it on the USB in the PS3 UPDATE folder
-Now go to your PS3 and start the Restore mode.
Please not... After this point, if you do something wrong, you have a major possibility of "bricking" your system. I am NOT Responsible for your attempts at this.
Plug in both controllers, if your second controller does not turn on, you are okay, if it does, you need to put it back into restore.
Have the 2nd Controller once its made sure that its OFF not on, Make SURE that its OFF otherwise, PS3 will brick, While your in the restore menu, SPAM the 'O' button with the help of a friend.
Click "Restore System Default" With first controller, and AS YOU press it, unplug your power cord.
Okay so as soon as you unplug your PS3, make sure Controller 2 is still spamming O
Plug power cord back in, Hold the "Disk Eject" Button for 15 seconds, While Still spamming O
After 15 seconds, quit spamming O, Unplug controller 1, Put controller 2 into Controller 1's slot
Put USB with 3.21 in.
Enter restore mode.
If you did it correctly, you should go to Update, and be able to update to 3.21, If it does not, just retry the following steps, if you did something wrong, your PS3 will have bricked... Sometimes it just doesn't work because you didn't continue with the spamming the "O" button.
After you update to 3.21, Unplug power cord. Put the 3.21 USB in Controller 2's slot, put Desired Frimware USB in other slot, use wireless controller now.
Instert your CD/ early Game.
Turn on your console.
Keep pressing the PS button on your controller until it brings up a screen that will have 3 options:
"Terminate HDD Memory"
"Report Sytem Defect to Main Hub"
"Insert new Default Update"
And you will see the Registerd TradeMark Sony PS3 at the bottom.
Turn off your controller, unplug 3.21 USB, plug in Controller 2.
Press "Insert new Default Update"
It will ask for default update's registration code.
Here are a list of registration codes, they all work.
DO NOT Input them wrong, or it will YLOD your sytem.
(Note: There are different codes for slims, Look them up, also i couldn't find the 3.41 code, sorry)
Then it will say "Override error" Have an option to click "OK" or press O to leave the screen.
Switch controllers from controller 2, to controller 1, then press "OK"
It will ask for the serial number of the system.
Just enter "PS3XPR.%34" For fats and "PS3XPR.%34S" for slims.
And it will let you continue.
It will ask you to click "OK" one last time
Then you will have to press "Install"
Let it download the update, When it's finished, it will shut down, the red light will flash 3 times, Green 3 times, Red 4 times, Green 3 times, Red 5 times, Green 3 times, Red 6 times, green 4 times.
IMMIDEIETLY at the end of Green 4 times "Beep, Beep, Beep, Beep"
You have to unplug the power cord.
Then plug it back in after 15 seconds.
You will start up your system with none of your USB slots being used, it will then install the update, and restart your console.