[Release] 6.3X Downgrader v3.5

The 6.3X Downgrader has been updated to Version 3.5!

Changelog:

v3.5: If the 6.20 updater MD5 check fails, it will check if the update file is 6.35, allowing non 07g/09g to downgrade to 6.35, added source, removed a few debug printf's

6.39/6.38/6.35/6.31 -> 6.20/6.35 Downgrader By Davee, ported to 6.38/6.39 by some1

What does it do?
Allows users who are incontent with their firmware to downgrade to 6.20 using the Sony Updater.

How do I use it?
Copy the "PSP" folder to your PSP. The downgrader is "signed" and can be launched from OFW XMB. You need to copy the 6.20 update to PSP/GAME/UPDATE/EBOOT.PBP and for PSPgo it must be the eflash it is placed on. After setup run the downgrader and follow the onscreen instructions.

If you have anything lower than an 07g place the 6.20 update in PSP/GAME/UPDATE.
If you have an 07g or an 09g, place the 6.35 update in PSP/GAME/UPDATE.

[What does it technically do?]
6.20-6.35: It uses the utility/power exploit to gain kernel access and reboots into the updater with a special PRX running. This PRX uses the pspdecrypt functionality to decrypt the updater PRX when needed. This allows the updater to boot in the newer firmwares.
6.38/6.39: It uses my http_storage exploit to gain kernel access. Basically, http_storage has a vulnerability in it, where I can write -1 to anywhere in memory. (I'll make a post to explain it more in-depth soon)

[I'm a dev, sup?]
The source is included in the download package.

Credits
Davee - legend. Originally made 6.35/6.31 downgrader
bbtgp - legend. Continued updates to psardumper (pspdecrypt) and the signing application "prxEncrypter".
coyotebean - legend. Coninuted updates to psardumper (pspdecrypt) and large influence and research regarding cryptographics.
kgsws - legend. First application signed and method released.
Silverspring - legend. Lots and lots of info on KIRK where we'd still be in the dark without.
Bubbletune - BTCNF injection code and bits and bobs here ;D

READ
You run the application at your OWN risk. I am not help accountable if you PSP shoots up.

Another important note: After you downgrade to 6.20, you will get a BSOD (saying that your system information is corrupted), this is OK, just click circle to reset your system information and you will be back to normal.

Download :

[You must be registered and logged in to see this link.]


07g/09g:
[You must be registered and logged in to see this link.]
Download6.35 Firmware Update for PSP GO



[You must be registered and logged in to see this link.] (for checking your PSP model)


[You must be registered and logged in to see this link.]

Use [You must be registered and logged in to see this link.]. So you can download using your PSP from Megaupload.

awesome. so no more pandora battery?

Yea i know but i heard this could brick your psp D:

Nah this was release like 2 months ago.

It's safe aslong as you know what your doing

lol iv used a downgrader once then i just updated again to 6.29 to get cfw on that

lol I mainly use my 2k, so I had it on 5.00 m33-6 for almost 2 yrs. Now I have it on 6.39 ME-9 cause I don't like PRO.

Yea my 3000 broke so then i got a psp go then i didnt like that then i went to get a psp 2000 phat and they didnt have that so i had to get a slim then i downgraded to 6.20 because when i got it, it had 6.39 then someone *cough* Avie told me 6.39 cfw was good on a 2000 and he was rite its acualy good so now i have 6.39 me-8 and i like it. I never knew there was me-9?

Yeah it's been out for the last 2 days. You can get it [You must be registered and logged in to see this link.]

You probably missed it cause everyone on this site except for Kyo, Akira, and me are PRO user fans

I was the first to post the new ME update on 3 major PSP sites for the 3rd time in a row