On this video you are going to watch how to upgrade to offcial firmware 6.20.
More 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/
