Region changing (Triforce / Chihiro)

I found this spanish post while doing a google search. http://www.retrovicio.com/foro/showthread.php?t=9901

Google doesn't do a great job of translating it but basically all you have to do is turn on the triforce or chihiro motherboard with nothing connected except for a satellite / netboot pic security chip. Then go into the test menu using the test button go down to system information and press the service button 30 times.

For Chihiro you have to press service button 15 times until GAMEID appears. Then press service a further 30 times.

Thanks goes to Android for the original post.