not sure if already mentioned; if a (proper) netboot/debug pic is used in a Triforce/Chihiro, you can switch the region of the board by pressing the service button a couple of times, just to add some random stuff to the thread :)
Be sure, that your P1 & P2 coin meter has been "bridged" like described here on the bottom:
http://triplemoonstar.brinkster.net/theshed/default.asp?stockid=1718