Brewology

Here's a small guide on how to get it running, i've just released a 2.71 firmware needed files compilation that im going to upload to any place ill update this once i have it uploaded---->

Download Devhook 0.44 and put everything on the memory stick as usual.
Download the 2.71 Firmware update from our site.
Open the EBOOT.PBP with PBP Unpacker or a similar application and extract the DATA.PSAR file.
Put the DATA.PSAR in the root of the memory stick. (Not in any folder)

Run the included Devhook installer on the PSP (install flash0 and flash1).
Extract Devhook 0.44 again and overwrite everything in the dh folder (its going to be a couple of .txt files which include the path for the prx's)
Use the 2.71 Decrypter to obtain your own copy of a decrypted reboot.bin file, or make use of Google to find one online

Place reboot.bin in ms0:dh\271\reboot.bin
Note: You'll need the decrypted Flash1 files from 2.60 Firmware (system.ireg and system.dreg) and be sure to remove any previous versions of DevHook from your memory stick first!

And some tips...

DevHook v0.44 now emulates v2.71 FirmWare allowing 2.71 image support. Some NOTES on this release are as follows:

- If you can't get 2.71 working with 0.44 (your PSP won't reboot into 2.71, it only switches off) then on the DevHook menu go to OTHER and change the PRELOAD ADDR to 89000000 and it should work then.

- If you boot DevHook with 222 MHz and then in the XMB using select + mode change(home+L/R) "overclock" to 333 MHz (but not in the DevHook menu) then booting at 333 MHz shouldn't freeze anymore allowing you to run iSOs overclocked.

- If you are NOT getting the 0.44 FULL version, then don't forget to replace dh/271/flash1/registry/system.dreg and system.ireg with the ones from a lower FW install. You'll need the following decrypted Flash1 files: reboot.bin, system.ireg, and system.dreg. Place reboot.bin in ms0:\dh\271\reboot.bin

Note: Make SURE to delete dh/271/flash1/registry/init.dat if there is one... if not, then you can simply ignore this note

to config the devhook you have to press o once it is started, to stop the autorun...settings:
UMD Select: (choose your iso, cso or --UMD DISC--)
UMD Mount: ISO ANYUMD
UMD Version: 2.xx > 2.00
Firmware: 2.60/2.71
CPU Clock: 222MHz / 111MHz (that is what I always use no problems)
Boot Select: Reboot XMB
Other: preload address: 0x88E00000/0x89000000(2.71)

When selecting a UMD Disc with the UMD Select option the other settings will be changed automatically so the UMD will run, the settings can be changed back later by pressing O when DevHook is auto-starting.

hope you enjoy it again

Its nice to see your alive Vitin, looks like the whole crew might be coming back. As soon as the file cap on the PackGen is fixed we will have it on their also.

lol, ive just uploaded it here

http://www.megaupload.com/?d=EBOFNJIT

very cool, good job, but I already got it workin lol, good to see that you are coming back slowly, but then again slow and steady wins the race lol

Aw dang, I was gonna make a tutorial about this lol.
I was almost finished too until I saw this..............
well good job anyways.

I also heard that if you replace the wlan.prx with one from a 2.0 dump, that WLAN works correctly on 2.71, but I will try it out to confirm it.
----edit----
Sorry, I just heard from a few places that the wifi didn't work right, and I too had this problem, but if you replace the wlan.prx with that of a 2.0, it works just as it should.

the wi-fi works perfectly in this version of devhook even if you overclock at 333Mhz

Sorry, im a noob to all this and am pretty annoyed now that i upgraded to 2.71!

What does Devhook allow me to do?

Nothing for you sadly, you need a v1.5.

poor him is any one working on a downgrader for 2.7 and 2.71 user my freind is realy wanting to play sum of the games i have... also sumbody was working on a downgrader for factory made 2.6s any progress on that?

2.5/2.6 downgrader is already done. so now you can emulate all firmwares with a 1.5, dont have an excuse for downgrading...except you need a friend with a 1.5 psp for downgrade yours

I just can't wait until custom firmwares come out.
But wont custom firmwares be able to have .exe files run on them?

i dont kno much bout tue cfw thing but i already downgraded my freind has 1 of those ta0 or w/e factory mad psps so he cant downgrade with the current 1

yes fu***n' 2.5 factory sh*t well for sure theres somebody working on that...and always you can buy undiluted platinum for the lastest option