aqui tienes el firmware http://www.infinitymod.com/matrix/files/downloads/InfinityFW175.zip y aqui el dev http://www.infinitymod.com/matrix/files/downloads/Dev2Installv11.zip grabalos a poca velocidad y en cd's de calidad.
Put Upgrade CD into PS2 and put PS2 into standby.
Press "reset button" and keep pressed until blue light turn ON (on V1-V11).
(For the V12 press reset button from standby for 2-3 seconds as there is no blue light).
Leave "reset button" and Upgrade CD will boot.
Follow on-screen instructions to complete the Upgrade procedures.
Salu2.