If you're into PSP hacking, check out this video for instructions on how to perform the tff exploit, as well as how to get Custom Firmware for the psp 300X series. There are many ways to perform this exploit; this video shows a few of them.
ChickHen + CFW
Be sure to place your PSP in Standby, as opposed to shutting it off, or else you will lose ChickHen and CFW.
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