advice for building footswitch for guitar hero controller

[paladinx00]

So the guitar hero controller has a select button that activates star power. The easy hack is to simply open the guitar and run a wire from it to a momentary switch but that's not what I want. Ideally I'd want a single cable going from the guitar to the footswitch and the footswitch to the ps2.

One idea is to run the controller into a sort of passthrough device that handles the select data. I figured I could splice a junky ps1 controller into an extension cable but my electronically inclined friend said that that would mess with the serial data unless we built a circuit. Maybe if an existing wired passthrough device for ps2 exists, we could save some work. I've seen a wireless passthrough device from doing google searches.

Another idea is to keep the guitar controller plugged into the ps2 port and wire the footswitch into the usb port. Red Octane does something similar where the action pedal for time crisis plugs into the ps2 port and the light gun data comes in through the usb port.

Any advice or even new ideas to try would be great.

[J.F.]

I'd probably make a box with a PIC chip that the guitar and foot pedal plugged into, then the box plugs into the PS2 controller port. When you push the foot pedal, the pic then forces the select button on reads by the PS2 of the guitar (the ps2 requests controller data, the box requests data from the guitar and passes it along, adding the foot pedal at the appropriate place).