*PLEASE READ DESC.*
This is a tutorial on how to hack your psp 3000 or 2000 (the one that can't be hacked with the pandora battery)
*You'll need 5.03 firmware to do this* nothing else will work.
ChickHEN - http://dl.qj.net/5.03-ChickHEN-Enabler-Revision-2-PSP/pg/12/fid/26993/catid/114
CFW Enabler 3.60 - http://dl.qj.net/Custom-Firmware-Enabler-v3.60-PSP-Homebrew-Applications/pg/12/fid/27382/catid/151
5.03 Update - http://www.psp-hacks.com/file/1645
(just open the zip folder then put the EBOOT.PBP under /psp/game/update)
If there is no update folder just create one. Then run the update on your psp.
To put games onto your memory stick, you will need to download an ISO or CSO file from a site like PSPISO.com.
Make a folder called ISO in the root of your memory stick. Place the ISO/CSO game into the ISO folder. Run the games through the XMB in the game folder.