He estado leyendo en posts,osea,he investigado,y por lo que he leido si funciona en una psp 3000 4g,solo que hace falta tener el hen activado primero.
TEXTO EXACTO
Tried it on my PSP3000 4g and it
didn't work. What happens is:
The program boots up, displays a
message that is along the lines of
"Downgrader 6.35->6.20, please
wait" and shortly after that, my
PSP turned off. When I turned it
back on and checked the
firmware version, it's still 6.35.
Okay, fixed it. The readme states
that you can run it from OFW
XMB. It just shuts down if you do
that though, so you need to run
HEN first, and the downgrader
after. I am currently
downgrading, will edit this post
after it is finished with the result.
EDIT:
It worked! So, confirmed
working on PSP3000 4g.
Also, don't freak out if a message
saying your settings are
corrupted after you downgrade,
just press the circle button and
everything will be fixed.