Latest version that can be
modified is v3.03 so if you have a console with version below this
number then you will be able to run downloadable PSP games on your
console. You can check your firmware version under System
Settings->System Information icon. Number next to System Software
should be below v3.03 as of this writing. There is a possibility that
after some time downgrade software for newer versions will be released
but chances of this happening are getting less likely with each version
because security of those newer versions is getting tougher and harder
to find holes in.
In case you haven't even purchased a Portable
Sony Playstation yet and are just planning on buying it then I strongly
recommend to look for one that is equipped with firmware version 1.5
originally and usually sellers even use this as benefit that console
they are selling has this version but if it's not mentioned you better
ask before buying.
After PSP is downgraded to 1.5 or was
originally with this version you can do the next step that will allow
running downloadable PSP games on your console which is upgrading PSP
but this time with custom firmware. This is required because most of
newer games are only running on newest versions which means majority of
games will not run on version 1.5. There are of course emulators and
loaders that will allow you running even on that version but hassle
with running those is much bigger and chances that PSP will hang up
much greater.
Besides custom version which right now can go as
high as version 3.52 will give you all the benefits of original new PSP
consoles like internet browser, media processing and more. Even some
additional custom things that only come with custom versions like extra
codec to play video files not just in MP4 format. But main benefit of
having custom version is that PSP will be usable just like having
newest original firmware without any need to run emulators or loaders.
After
all of this is done you just need to find good quality service which
offers downloading PSP games and usually also will include access to
videos, music, custom themes and other PSP related downloads with
responsive support and tutorials on how to upload and use all of this
on your PSP. I spent some time checking out several sites that offer
such service but was satisfied with only one as it had all the titles
that have been released for PSP and lots of additional media with
highly responsive and quality support.