NOTE: You need a PSP that already has a M33 custom firmware or 1.50 Official Firmware, Other custom firmwares might work with this guide also, but im not sure... If you don't have a custom firmwared PSP, go here: http://forums.benheck.com/viewtopic.php?t=26459 to learn how to custom firmware it. ( that link will also show you how to unbrick your PSP.... )
Also, you can be on any M33 Custom Firmware. So if your Phat PSP ( PSP-1000 ) is on 3.52 M33-4, you can update straight to this firmware. You DO NOT need to update to 3.71 M33-4 or 4.01 M33-2 ( or some other ) and then this, you only need to update to this. Nothing in between...
If you would rather use a PSP with a WiFi connection, you can use the guide by Aguilz, which can be found here: http://forums.benheck.com/viewtopic.php?t=28060
So lets get started!
You Will Need:
• A Computer that you can browse files that are on a memory stick
• An Internet Connection ( duh )
• winRAR or something that works like it... ( if you don't have winRAR, download the trial here: http://www.download.com/WinRAR/3000-225 ... 07677.html and install )
Now you will need to download these four ( 4 ) files:
5.00 Official Firmware: http://rapidshare.com/files/154173870/500.PBP ( mirror: http://www.megaupload.com/?d=K50DK6PK )
5.00 M33-6 Custom Firmware Update: http://rapidshare.com/files/186553068/500m33_6.zip

Only for PSP-1000's:
1.50 kernel addon for 5.00: http://rapidshare.com/files/155242372/150k_addon500.rar ( mirror: http://www.megaupload.com/?d=SO1ADK4B )
1.50 Official Firmware: http://rapidshare.com/files/139611825/150.PBP
Now unzip the 5.00 M33-6 update. ( zip is called 500m33_6 )
copy the 'UPDATE' folder into this directory on your PSP: X:PSP-->GAME ( where X is your drive letter, like mine is F )
Now open up the 'UPDATE' folder that is in your memory stick and put the '500.PBP' you downloaded into the 'UPDATE' folder.

Now exit USB Mode, if you have a custom theme on, put the official theme on.
Go to your 'Game' menu on the PSP, go to memory stick, and run the 'PSP Update ver 5.00'

Don't worry, it might look like its updating to the official firmware, but its not.
When it gets to the end, you might get a blue screen with in a couple languages saying a warning, if you do, it means you have a custom theme installed.
Shutdown your PSP manually after that screen disappears and then turn it back on. Now you will have to redo your settings. When done, you now have 5.00 M33-6 installed on your PSP!!
Format Your Memory Stick.
THE KERNEL ADDON BELOW IS ONLY FOR PSP-1000'S ( PSP-Phat ) IF INSTALLED ON A SLIM & LITE PSP, IT WILL BRICK AND CANNOT BE UNDONE!! ( BELIEVE ME, IVE TRIED IT, I NEEDED A NEW PSP )
Now if you have a Phat PSP ( PSP-1000 ) make sure you have loaded the 1.50 Official Firmware above and the kernel Addon.
If you have Installed this on 5.00 M33-3 or 5.00 M33-4 you dont need to do this again.
extract the '150k_addon500.rar' to somewhere, and put the '150k_installer' to this directory on your PSP: 'PSP-GAME5XX'
And copy the 150.PBP to the root of your memory stick.
Now exit USB mode, and go to your 'Game Menu' on your PSP, go down to 'Memory Stick' and press 'X' on '1.50 Kernel Addon for 5.00'
go through the installation of it and reboot when it asks to.
Now people with a phat PSP can play homebrew on their PSP!!
Hope this helped someone, if you have any problems, just comment here or send a PM =D
ill put some images up of the installation of both 5.00 M33-6 and the 1.50 installer, when i have time =D





