Heres the official release text translated from Spanish.

Before anything, Dark_Alex deserves enormous appreciation.
Thanks to him for learning a great deal about reverse engineering.
After analyzing all the code of 3.71 CF m33-2 (We can demonstrate for those that have doubts.),
and after knowing Dark_Alex did not plan on releasing a 3.72 CF. I decided to adapt 3.71 m33-2 to 3.72.
There were barely any changes to this firmware (5 different addresses to patch by vshctrl.prx in some modules of vsh, and some other things.), so the only thing was adapt the code of 3.71 to this.

The updater I use for this process is the same one DAX made for 3.71 (also I reversed the whole thing, all the components, so all the code of the updater is mine taken by reverse and tested in my fat and slim).
It does not include 1.50 compatibility, there should be no problem installing it, the DAX program only works with 3.71 because it checks the firmware version (confirmed, if anybody has doubts this is fw 3.72 you can run the DAX 1.50 installer and see that it won’t run)
I am reversing it, (I am almost have it complete), if I reverse and have time I will make a patch for this.
INSTALLATION
Put the eboot and umodule.prx in the folder PSP/GAME/UPDATE, paste the official 3.72 eboot named 372.PBP in this folder and launch the program.
Sony’s code will run installing firmware 3.72, and when asked press X to restart IT IS VERY IMPORTANT TO PRESS X, DO NOT TURN OFF THE PSP MANUALLY! Explanation, in the moment you press X the umodule.prx will do its job installing the files of CF in the flash, and then the system will restart.
If you don’t press X, you will brick for sure(explanation, Sony updater will only flash the IPL to 99%, but the modified updater also installs an IPL custom block, which in the start try to load x files if they are not there will produce a brick).
Tested on a PSP fat 3.71 m33-1 and 3.71 m33-2 and also in a Slim with the same CF.
Thanks to DAX for the original code (and the fun I had with it) and Coolj for testing my update code and the fixes in 3.71 m33-2 for the 3.72.
_HellDashX_
PS. Like always all flashes have their risks, so DO UNDER YOUR OWN RESPONSIBILITY

100% A.O.K

OK so yeh i checked this and everything is crisp. Just follow all the directions and everything will work out fine. Please note for those who have any home brew or custom\prx ’s just after the installation is complete navigate to mso\psp and rename game(xxx) to Game372 and all home brew will be fine. for prxs if you haven’t already downloaded le recovery 3 download and install cuz its a lot easier if not then just navigate to m33 recovery menu and activate them there (yes after the install you need to enable them again) as far as everything else goes you are in the green – the 1.50 kernel ….but yep good luck and thanks HX

for those who need additional help\faq email me @DigitAleX_Hact0r@hotmail.com
I’ll be glad to help!

I heard that pops (psx emulater) doesn’t work. Could you test this?

Ok Give me a sec

PSX Emulator doesn’t not work. POPS is a no go! It starts might load the first warning screen then crashes the PSP Slim

I have checked it out….you still need a pandoras battery for this.

Johnny Appleseed: I don;t know where your getting your info from. You don’t need a Pandoras battery. You just need 3.71M33 to upgrade from that.

Well I have PSP slim and tried the above, I only have 3.71 official not M33 firmware, tried the above so I am now assuming it will only work if you have pandoras battery installed which I do not have, if there is another way, I don’t know.

you forgot to say how much memory you need i already know but just the heads up

OK I am a noob…I have psp slim with firmware version 3.71 official, I don’t have a pandoras battery, is there any way other than having another PSP fat homebrew to upgrade my psp slim to a homebrew?

izzit cant support psp fat? bcoz i hv tried it on my psp fat but it wrote that error on idstorage….may i know what problem is tat?

[...] all the details here [...]

is there anyway for official 3.72 to install this cfw? if there is, please tell me..:(

nB, you need the pandoras battery and id storage *SHOULD* be automatically corrected when using updaters (I’m not sure about this one though..)

I’ve gone back to 3.71 M33. I like my PSX games too much

AS many of you may not be awhere of 3.72 -HX has a hell load of problems. Though i do apreciate HX’x help in the scene more debugging is need before you releas another version.Firstly pops we all know what the errors are so i will not rediterate. Secondaly the keys are corrupted they were not auto fixed so a lot more erros will follow. 3 rdly incompatible prx’s etc and you need your own recovey/; vsh menu etc…

How to downgrade 3.72-HX
For those who have already upgraded and now are kicking themselves in the ass here is how it is done.

1.Create a pandor battery espertar_cementerio is the better one (i will not waste time explaning how to make this google it)

2.Install 3.72-m33 over 3.72 hx-1 and you are good
just format your flash 1 files auto not manually and you are good further help and info email me DigitAleX_Hact0r@hotmail.com

IN REGARDS TO MY LAST COMMENT THE PANDORA IS despertar_cementerio 3

GOOLGE Pandora_s Ultimate Magic Stick v2 DOWNLOAD AND INSTALL ANY YOUR GOOD

pREVIOUS LY HACKED PSP NEEDE TO CREAT THE BATTERY

can this update v3.71????plz reply

how come every time i try to run an update to custom reg my system it says “the game could not be started. (8002048)

please when you add the 1.5 kernel add support for 3.71 its crazy hard to make a dowgrader for it

I need help, i already have the updated psp version 3.72, how can i get this custom firmware update when i already have 3.72. HELP ME!

does this play homebrew and if it does where do i get the homebrew games

WELL MINE DID NOT WORK I HAVE A PSP_1003 AND I ALREADY HAVE VERSION 3.72 BUT THIS WAS MEANT TO DOWNLOAD 3.72 HX-1 WAT WENT WRONG

For those of you asking about how to upgrade/alter offical firmware (OFW) to custom firmware (CFW), you will need a pandoras battery to do this. The pandoras battery simply allows you to start up the PSP so it goes into service mode – then you can install the CFW from the memory stick.

Hiyz all of you guyz ,
Tell me 3.72 HX-1 is greater then the nice 3.71 M33-2 CF , answer me at my hotmail ID CYA.

!! HAPPY LIFE !!

decent_rehan09@hotmail.com

Does anybody tested it under 3.71 m33-3… I’m under this version and want to know if it works to install this 3.72 hx-1.

i just bought a psp ver.2.01 can i upgrade it to 3.72 and how?? im a noob here thanx…….

when i try to update from 3.71 to 3.72 m33 i get a error saying could not load game … does anyone no what i am doing wrong?

i mean 3.72 hx-1

hi i have 372 psp slim i put in folder game the update folder now i tried to update it says there is no need to update

what can i do and one wore question what does custome firmware does anyway im new at this

i just have 372 offical sony regular firmware

Hi i just bought a PSP Slim today and i was wondering what it is that makes u play .iso games on your PSP ( I am guessing its the Custom Firmware ) , anyway a friend of mine has the PSP fat and a pandoras battery so plz help me and tell me how to install what ever it is that makes u play .iso games . my e-mail is : ahm157@hotmail.com.

oh yah i forgot the most important thing my Psp Slim came from the factroy with Firmware ver.3.72 (original) , it would be nice of u to reply to me on my email , as it is the only way that u might reach me (dont go on forums much .. )

hey! hellou
i’ve just bought a PSP few weeks ago, it’s version is 3.72 and i would like to know if i can play same pirates games.. cause i can’t find any software o person that can help me with this

i hope you have the answer

thanks

This report is excelent!