Thanks for all the feedback to help me add important notices to this.
Devhook 0.42 Has Been Released Please Do Not Post About Any Version Previous To Devhook 0.42 :)
NO TALK ABOUT ISO's OR HOW TO LOAD THEM PLEASE!!! IF YOU INSIST ON USING ISO's WORK IT OUT ALONE! DO NOT EVEN OFFER HELP THROUGH PM YOU WILL GET BANNED
Ok you need to download version 0.42a of the DEVHOOK program, and due to recent update version 0.42b Please remember that Devhook 0.42b is not a full version of devhook its just a small patch. Please install 0.42a first.
Devhook 0.42b (Most recent update)
Now extract the Devhook 0.42 to your memory stick so you have:
Drive letter [Root of your mem stick]
Please ignore the fact it says devhook 0.40 the pic is old but the folder layout is still the same :)
Now extract the 0.42b patch and overwrite the old files in your memory stick.
Now get a copy of the Firmware 2.5 eboot and grab a copy of PSPBREW
Once you have downloaded these and installed PSPBREW you can continue.
Load PSPBREW and then load the 2.50 update eboot.
On the bottom of the program u will see a list of files in the eboot (on the right box bottom) and you have to click the Data.psar and click extract file.
This extracted file you have to place in the root of your memory stick.
Click Number 1 And Then Number 2 , It Really Is That Simple :)
Then go to your psp game menu and load the DEVHOOK FIRMWARE INSTALLER it will detect the 2.50 data and extract it into the right place for you.
Once this is installed go ahead and run DEVHOOK 0.42
with the settings:
(Take note that the eboot on the psp doesnt change every patch so it will still say Devhook 0.42 instead of 0.42b)
UMD-MODE = UMD DISK
UMD VERSION = 2.xx -> 2.00
FIRMWARE = 2.50
CPU CLOCK= 222 if you want WIFI i belive ( i think you can run wifi on 333 but not sure can someone confirm this for me?)
BOOT SELECT= reboot XMB
then press start and it should load a 2.50 firmware just like a brand new PSP.
Last thing before you press home and realise you cant quit and go OMG THEY BUGGERED ME OVER THEY HAVE INSTALLED 2.50!!!! remember its an emulator. You cant Quit your psp on real firmware. You have to hold the power button for 10 seconds and your back to 1.5.
** IMPORTANT: IF YOU HAVE PROBLEMS USING 2.00 AND 2.50 EBOOTS TRY AND GET A GAME UMD WITH THAT UPDATE ON THE INSTALLER CAN EXTRACT FROM YOUR UMD IF IT DETECTS IT!!! **
** IMPORTANT NOTE ABOUT 3rd PARTY MEMORY STICKS AND DATEL HDD: IT SEEMS MANY PEOPLE HAVE PROBLEMS WITH THESE ITEMS TRY OUT AND POST YOUR RESULTS**