“DevHook 0.51 has been released, and now emulates firmware 3.01! There are 2 different Ultimate Installers available for this release, Ultimate Installer v1.5.2 for firmware 1.50 and Ultimate Installer v1.5.2 for 2.71se firmware.
The installation is almost the same as the DevHook 0.50 installation however a couple of the steps are different. For instance, the supplied .bat file didn’t do its job properly so each step will be explained here.
Connect your PSP to your computer using the USB port and initiate the USB file transfer mode. I recommend making a backup of your memory stick first. I went as far as backing up my memory stick then formatting it to install DevHook 0.51 on a fresh stick. Follow the on-screen instructions. You will be prompted to choose which version to install. I chose the Full Install.
Accept the license agreement, then select whichever drive your PSP is. The files will now be copied to your PSP.
The files are now copied to your PSP, you can hit the circle button on your PSP and exit out of USB file transfer mode. Now head over to the GAME menu, and select the PSAR Dumper. This will load a program that decrypts everything that is needed. Once the dumper loads, press the X button.
Once everything is complete, fully turn off your PSP. Don’t just put it into power saver mode, turn it right off.
Okay, you can now turn your PSP back on. Once again go and initiate the USB file transfer mode. Access your PSP through My Computer, you will see alot of files and directories. Some of these files and directories your going to move, or delete, some you won’t touch at all.
The first thing you want to do is access the folder labeled “”f0″” and you will then find a folder labeled “”kd”” go inside of this folder aswell. Once you are inside of the folder labeled “”kd”” delete the file “”audio.prx””
Now copy audio.prx from the “”x:temp”” folder and put it back inside of “”kd”” folder inside of the “”f0″” folder.
Now access the folder labeled “”dh”” and create a folder labeled “”301″”. Now move select the “”f0″” folder and completely move it to the newly created “”301″” folder, inside of the “”dh”” folder.
Now go back into the “”temp”” folder and move everything inside of it to “”x:dh301f0kd””.
Now access the folder in “”x:dh301″” labeled “”f1″” and create the following folders: “”dic””, “”gps””, “”net””, “”nethttp””, “”vsh””, and “”vshtheme””.
You can now go back to the root folder and delete the “”temp”” folder, the “”DH_README”” folder, and the file labeled “”DevHook Setup.bat””. Also while you are deleting stuff, you may go into the “”x:pspgame”” folder and delete the PSAR dumper, as it is no longer needed.
Turn off USB file transfer mode and go back into the GAME menu. Now you can Launch DevHook 0.51.
Once you are inside of DevHook 0.51 go to the “FIRMWARE†menu and select the 3.01 firmware. You can now start DevHook 0.51 and watch your PSP boot into the 3.01 firmware.
Enjoy :)”