Just an interesting read ...
(quoted from the link, posted by someone named mallocmalloc)
http://forums.ps2dev.org/viewtopic.php?t=1534
So I'm locking this one. Go talk in the other one.
Which is a repeat of this thread:Great, if you've got the sdk, compile one of the sample (balloon ?),
and try to replace the DATA.PSP on the sony firmware 1.5 update .PBP with
the .elf you just compiled renamed in DATA.PSP (remove the PSAR by the way)
(you can use one of the tools available to edit the PBP)
Run it on a 1.0 retail PSP ... and voila !!! : you've got a running program on
a retail PSP !! but it works only on old 1.0 psps not on 1.5 ...
But that's a start !
http://forums.ps2dev.org/viewtopic.php?t=1534
So I'm locking this one. Go talk in the other one.