Downgrade 5.03 to 3.90

[ghandisonu]

i want to downgrade 5.03 to 3.90 .I have downloaded custom 3.90 but I dont know how to download it back on my psp .
Pls help step by step

thanks

[danos]

use the second link in my sig to hack your psp

[Mitochondria]

If you have a hackable psp, you can downgrade back. In which case you can use this guide.

Btw, you cannot downgrade/go backwards just by updating to an older firmware. It doesn't work that way, nothing does.

Damn you Danos

[danos]

ooh i forgot to say to check to see if your mobo is hackable by using the first link in my sig

@mito lol