On this episode you are going to see how to upgrade your PSP to 6.20 firmware.
Further info at http://lgallardo.com/en/2009/12/21/como-actualizar-el-psp-al-firmware-6-20/
Watch the Spanish version here: http://lgallardo.com/2009/12/21/como-actualizar-el-psp-al-firmware-6-20/