With the new System Firmware 4.00 for the PS3 i decided to see if downgrading was still possible. IT STILL IS!
Anyway, i decided while i was at it, that i may as well make up a guide for Dual Booting cfw and ofw (or half booting, as e3 call it)
Also i suggest people trying this, or just downgrading in general read HERE
to get some background on the downgrade process via flashing.
For this you will need a few things. They are as follows:
- Playstation 3 console that can run 3.55 (Newer slims may not work)
- A way to get into service mode (dongle,psp,ipod,andriod, etc)
- PS3UPDAT.PUP 4.00 (DOWNLOAD HERE)
- Rogeros CFW3.55 syscon patches (DOWNLOAD HERE) rename PS3UPDAT.PUP
- Downgrade Patches V2 (DOWNLOAD HERE)
- A USB stick 512MB or larger for service mode software install
- 2 seperate Harddrives, 1 for OFW and 1 for CFW
First things first, you need to install system firmware version 4.00 to your ps3. You should all know how to do this.
Next, remove the harddrive. From now on we will call this drive OFW drive for 4.00.
Insert your other harddrive and reinstall the system firmware. This drive will now be called CFW.
Connect you Hardware Flasher to the ps3 and read the NOR/NAND. Make at least two dumps to compare and make sure they are valid.
Name this valid dump OFW.bin. Keep your dumps in a safe place.
Open one dump in a Hex editor and Copy in the patched files from Dospiedra's downgrade V2 patch files. (Just follow one of the downgrade tutorials on how to do this)
Save the dump as something memorable and keep in a safe place with your other OFW dumps.
Write your patched dump back to your ps3. Then you need to put your ps3 into service mode.
Now get your FAT32 Formatted USB stick and place Lv2diag.self (File 1) and the Rogero CFW V2 pup(Renamed PS3UPDAT.PUP) onto the usb stick
(make sure these are the only files on the stick.)
Place USB stick in usb port closest to the blu-ray drive and power/eject buttons and turn console on. You should see the usb stick flashing and the ps3 HDD light flashing every so often. Wait a few minutes and the PS3 should turn itself off.
Remove the USB stick and turn the ps3 back on. It should load into Rogeros 3.55CFW (system information will show 3.72). Now turn the ps3 off again.
Put usb stick back into the computer and delete the files on it. Then place the Lv2diag.self (file 2) on the usb stick and put it back in the ps3 in the same usb port.
Turn the ps3 on and it should turn off after a few seconds. Now you should have a working 3.55CFW on the CFW drive and 4.00 on the OFW drive.
Connect your flasher again and make another set of dumps from your ps3 flash. Name the valid dump CFW.bin. Keep these in a safe place.
Now all you need to do to dual boot from here, is flash your 4.00 flash dump(OFW.bin) back to the ps3 and insert the OFW drive for online play etc,
Then flash the CFW.bin to ps3 and insert the CFW drive to play homebrew etc
Enjoy your Dual Boot PS3