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TudorBlue
October 26th, 2008, 19:16
I have recently upgraded to 4.01 m33-2 but is it possible to roll my custom firmware back to 3.71 without too much trouble????
Buddy4point0
October 26th, 2008, 23:10
You should just be able to run the 3.71 m33 update from the recovery menu.
Just put the update in game/update (or whatever it says in the recovery menu, and run it.
TudorBlue
October 26th, 2008, 23:18
You should just be able to run the 3.71 m33 update from the recovery menu.
Just put the update in game/update (or whatever it says in the recovery menu, and run it.

I have done thi8s but when I go to run the update, I get a message flash up on my psp saying system software is 4.01, no need to update. Anyway of getting around this????
Buddy4point0
October 26th, 2008, 23:58
I have done thi8s but when I go to run the update, I get a message flash up on my psp saying system software is 4.01, no need to update. Anyway of getting around this????
Try going back to 1.5 using this method though the recovery menu, and then updating to 3.71 m33 the normal way.
mike_jmg
October 27th, 2008, 18:21
I think the only way is with a Pandora Battery and an older version of despertar del cementerio

But why do you want to go back?
TudorBlue
October 28th, 2008, 13:42
I think the only way is with a Pandora Battery and an older version of despertar del cementerio

But why do you want to go back?

I just want to know how to do it. I have a pandora battery and a magic memory stick, which I have borrowd off a freind. It had 3.90 and custom firmware 3.90 m33 on it. I have got a spare pro duo stick (1gig) I can use. What I want to do is create a magic memory stick that I can use with the pandora battery to take the psp firmware back to 1.50. Can I do this?? If so, how?? Thanks in adavnce
mike_jmg
October 29th, 2008, 07:07
You can go to 1.50 only if your psp is a phat (PSP-1000), if what you want is to run 1.50 homebrew you can just download the 1.50 kernel addon for 3.90M33 (http://www.psp-hacks.com/file/1414)

ok to go to 1.50, don't really know why you want to but ok, if you want to go to 1.50 go here (http://dl.qj.net/Pandora-s-Battery-PSP-Homebrew-Applications/pg/12/fid/14362/catid/151) and download the file, follow the readme