tip ko sayo, punta ka pinoypsp.. hanapin mo dun yung thread how to upgrade your (phat)psp.. nandun halos lahat ng info.. you just need to find it...
ang sekreto lang naman dito is magbabasa ka.
i learned upgrading and tweaking through reading readme and reading discussions doon... ngayon nakalimutan ko na kasi wala na akong psp