Please help support the site by donating at the link below.https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=8ZRU34U47BESW
you could make a pcb like this, and swap it our with the one inside the stock psp analog.
use your multimeter to check if one contact of the button is connected to one contact of each of other buttons
cool that diagram looks great be sure to post up a work log this is a pretty cool mod