Yea, check out
PSPMod.com. They have alot of info there. If you haven't upgraded the firmware past 3.50, your in luck. You can use a downgrader, available from
PSPHacks.com and a copy of Lumines to downgrade it to the 1.5 firmware. That will allow you to upgrade to the latest custom firmware, allowing all the homebrew capabilities. Another route is to use whats called a Pandoras battery and MS. That will downgrade it automatically, even if you upgraded past 3.50. PSPMod is the best place for info. If you need any more help, just let me know.