(adsbygoogle = window.adsbygoogle || []).push({}); Its slightly simplified with the new programs that were released. It still uses Linux so be careful when writing the commands. Recommend: flasher in case of brick.
It is not mine. All credits to kneeandarrow from ps3hax and to those whom he/she may have credited as well.
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From kneeandarrow:

CEX to DEX (translated from Italian site) :

I decided to simplify the original guide (which you can find it here) as new tools have emerged.

Requirements:
1) A PS3 with Firmware 3:55 or less (if less than you should upgrade to 3.55), you must install this CFW using Recovery Mode : You must login or register to view this content.

2) A USB keyboard and mouse;

3) Red Ribbon Linux on your PS3, you should download and burn this ISO :
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4) CEX2DEX, downloadable from here : You must login or register to view this content.

5) metldrpwn, downloadable from here :
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6) (Optional) although unlikely, is possible brick, so I recommend you have E3 flasher.


Installing Linux:


PKG download these:
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And download one of these two files (if you have a NOR take the first, if you have a second NAND).
1. dtbImage.ps3.bin (NOR) : You must login or register to view this content.

2. dtbImage.ps3.bin.minimal (NAND, to be renamed in dtbImage.ps3.bin) : You must login or register to view this content.

Put everything in the root of a USB device and install the PKG.
Each application you start before returning to the XMB will make 3 beeps the console, if you do not hear these 3 beeps try again.
1. Run "Setup for OtherOS FLASH", turn the console back to the XMB and restart.
2. Start the "Install OtherOS" (the key with the file dtbImage.ps3.bin must be inserted).

Now connect a USB keyboard and a USB to the console and launched from the XMB "OtherOS Boot" and "Reboot". You'll find yourself in "Petitboot".
Using the keyboard, select "Exit to shell" and press enter.
Type the following commands:

    Code:

mount -n -o remount,rw /dev/sda1 /tmp/petitboot/mnt/sda1

Codice:

dd if=/dev/ps3nflasha of=/tmp/petitboot/mnt/sda1/flashCEX.bin bs=1024

Now you dump your NOR / NAND USB stick. Turn off the console (ctrl + alt + delete or power button).

Now insert the stick into your PC and extract the folder "metldrpwn" from the "metldrpwn.zip" in the root of the USB stick.
CEX2DEX Start, select your dump and click "Extract metldr", save the file as "metldr" folder "metldrpwn" on your USB stick.

Go back to your PS3, plug in the USB key and the CD with the iso burned previously. From the XMB start again "OtherOS Boot" and "Reboot".
This time from Petitboot selected "Red Ribbon OTHEROS live" and wait for the upload.
If you do not have a USB hub you unplug the keyboard and mouse to attack, click the first icon in the upper left -> Accessories -> Terminal. Reconnect the keyboard.

Type the following commands in Terminal:

    Code:

sudo umount /dev/sda1

sudo mkdir usb

sudo mount /dev/sda1 usb

cd usb/metldrpwn/

sudo make

sudo sh run.sh

Will appear written, if all goes well you should read it somewhere "problem status (0x00000089)".

Type the following commands:

    Code:

cd ..

sudo cp /proc/metldrpwn/dump usb/dump

sudo shutdown -h now

The system will shut down.
Go back to your PC and start CEX2DEX, select new dump your flash and the file "dump" that will be on your USB stick, click CEX-> DEX, now you save a file, name it "flashDEX.bin" and save it in the root USB stick.



Return to the PS3, connect the USB stick and remove the CD.
Start again "OtherOS Boot" and "Reboot" on Petitboot select "Exit to shell"



Type the following commands:

    Code:

mount -n -o remount,rw /dev/sda1 /tmp/petitboot/mnt/sda1

WARNING : The following command will write the changes on your flash (NOR / NAND) and if you did something wrong you could brick. I do not take responsibility.

    Code:

dd if=/tmp/petitboot/mnt/sda1/flashDEX.bin of=/dev/ps3nflasha bs=1024

Now download a firmware from here DEX : You must login or register to view this content.

and place it in X: \ PS3 \ UPDATE \ PS3UPDAT.PUP (X: is your USB stick) :

Turn on the console in recovery mode and select system update. Now you have a Debugging Station.

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