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HELLO! There's no need to downgrade ur PSP. If u have upgraded ur PSP from the official site and a official firmware has been installed on to ur PSP, it won't execute games(ISO,CSO) from ur memory stick. It will only run games from the UMD. If u want to run ur games from a memory stick u have to install a CUSTOM FIRMWARE. Try www.psp-hacks.com these guys have many softwares on their site. Dont worry its not that hard to put a Custom firmware onto ur PSP.
Someone will have to run the flash program to get you back to M33. Pandora battery and Magic stick with M33 flash on it. Most homebrew and programs will not run on any M33 version above 3.9. New UMD games from sony will have the latest firmware and the children will usually run the firmware upgrade to play the game. It will allow the new UMD to play, but the Sony Firmware will write over the Custom M33 firmware and you will not be able to run the games on your Memory stick.
hi your previous psp version is 3.80 m33 if yes your using custom firmware that why you can play game to your memory stick the problem is you upgrade your psp firmware to sony official firmware 5.01 you reinstall your firwmware again using custom firmware like 5.00 m33-3 cfw below with m33 or OE
yeah, if your PSP is not Modded and it is running on official firmware of SONY, then you should prolly have it modded or have it made into custom firmware...If you don't know how to check the what firmware version your PSP is running...then here is how: open your PSP, then on the XMB, got SYSTEM SETTINGS then to SYSTEM information. on the top it says SYSTEM SOFTWARE, then check if your firmware version has a m33 suffix...if it doesnt have an m33 at the end, then it is an OFFICIAL firmware so have it modded, my friend...
It's impossible to downgrade your PSP from it's current version. I'm not quite sure why you'd want to downgrade, but maybe you should upgrade (If a version is available) again and see if you like that version better. ^-^
use this its the safest way and make sure your psp is fully charged and when you do the downgrade upgrade make sure ure psp in pluged in to
(just follow the instructons)