This is from the release notes of Wipeout:
Of course you can't play this game yet, and you won't be
playing it anytime soon on a burnt umd disc (as sony has
already said they wont be releasing burners for these).
However maybe it will give you an idea of what PSP games are
like, and just what is hidden on those little discs :)
Hopefully it will give psp developers a chance to look into
the files etc used on a UMD. Knowing what files are present and
where in the filepath they can be found may help with loading
of 'driver' files etc from disc.
(Hint: UMDs use an iso9660 based filesystem, so this image file
can be opened in any iso image browser such as isobuster to
look at, extract and generally play with the files within.
It could also be burnt to a dvd to let u access the files on
your computer such as in windows explorer)
Since this contains the ability for "web browsing" its hoped
that an exploit can be found that will allow the booting of
code on any version PSP. Check the unencrypted files on disc for
more info on exactly how the browser works.
I have the games, but im no coder - so they are not much use to me.