3.71 m33.... ganito bro. press mo "select" pag nasa main menu ka... or what we call XMB... yun yung pagbukas mo ng psp. then after pressing select, makikita mo don, yung "M33 VSH Menu"... try to look for "UMD ISO MODE" ibaba mo don then press right on the directional pad, at gamitin mo eh wag yung "Normal". Gamitin mo either M33 driver or Sony NP9660. hope this helps.