alright to be able to play games from your memory stick you need custom firmware
first up you will probally need to downgrade your psp the 1.50.
or try and buy a psp with version 1.50 already on it
here is the link to downgrading your psp
http://www.pspmod.com/forums/showthread.php?t=8718 (Madd Kat IS HERE)
then you need to upgrade to firmware 3.40oe a
http://www.pspmod.com/forums/showthr...ghlight=3.40oe (help....noob..)
then make a back up of a psp game and put it in the iso file and play away.
thats all you'll have to do