Cause you need to make you PSP Go To the lowest firmware (kinda like downgrade)
Then you can install you custom firmware
Get a pandoras battery and magic memory card...
Make or buy a pandoras battery
No, you can't. And even with a Pandora Battery, you cannot downgrade the 3000 or the late 2000 model.
http://www.pspmod.com/forums/psp-hardware-guides/23428-guide-making-pandoras-battery-new-method.html
http://www.pspmod.com/forums/psp-hardware-guides/23428-guide-making-pandoras-battery-new-method.html
no it cant with regular firmware . u need custom firmware. which then u need a pandoras battery and magic megory stick. so go to www.youtube.com/user/asianrappa
you won't be able to buy a psp with cfw on it. instead check out this Pandora battery and magic memory stick guide which will help you install cfw. http://www.pspmod.com/forums/psp-hardware-guides/28839-easy-use-pandoras-battery-guide.HTML
definitely no the best u can downgrade without a Pandora battery is 3.03.... what you can do is use the Pandora battery to downgrade and the results will be great I've done it on my psp and when i downgraded my psp i got to download as many games that can fit into my psp(full games of course) so downgrade your psp using a Pandora battery:)
You cant yet, We will have to wait for it to come out maybe late this year We shouldn't have upgraded to 5.51
u need magic memory stick and Pandora battery sorry i got same problem. What evera u do, do not attempt to make a pandoras batttery unless u have a spare battery cause u cant use Pandora to actually play da psp
You're in luck! There seems to be a homebrew enabler out for official firmware 5.03. http://www.youtube.com/watch?v=lPMiNTbL7YQ
Right now there isn't. If you want to get custom firmware for psp version 6.20 you need to downgrade to custom firmware using a Pandora battery.