You inspired me to go in the direction of a PSX controller which can go to PC via USB, PS2 or PS3.
Can the CP w/ the xbox board wiring also connect to the xbox 360?

PSX to USB, ehm... got me thinking, could save money on adapters.
Unfortunately it can not connect to 360 due to different connections, USB for 360. But would be just as easy to connect a 360 controller board.
I did not choose the 360 even tho I have 3 of em, jtagged and emulator ready, because of the reliability of the system. 54.2% returns on the consoles, these guys have issues! build the whole thing just to get a red lighted system every 6 months, no thank you.
UPDATE:
Close to completion, I have added ports on each sides of the cabinet to connect light guns for all these cool shooting games.
Revamped menu using unleashX giving the whole thing a new look and feel.
Repositioned CP buttons to have a better setup.
New Plexiglas on the control panel.
Light paint job on the trims to test color scheme.
Pics:







Vid:
Left to do :
Reroute Smartxx LCD screen to control panel.
Full paint job on complete cabinet.
Finalize and adjust menus and features.
One word to describe this project... addictive.