Inspired by this thread:
Apple Remote Steering Controls I decided to integrate the Apple Remote into my console.
First, I had to extend the length of the IR sensor board wire. I had previously removed it from the Mini and bought some three-wire connectors from a hobby shop. I spliced the wires one at a time, to make sure I didn't confuse them while soldering. Then I disassembled an Apple Remote and used the top as a template to drill holes in my console. It conveniently had screw holes which I used to secure it to the panel. I mounted the sensor board to the underside of the console panel, then ran the wire through the back of the console, up to the glove box where the Mini is and connected the sensor board to the computer.
The console panel is thicker than the Apple Remote casing, so I had to use felt and milk jug plastic to create a spacer between the control circle and the buttons on the remote assembly. Unfortunately this makes the clicks spongy, so I'll probably try to figure out another type of spacer that gives a more positive response.
The Mini also responds only intermittently to the remote, so I think the battery contacts are somewhat loose. The battery holder is not secured to the console which is most likely the problem. The Mini responds fine if I aim another remote under the console. I'm probably going to use the back of the remote case to put pressure on the battery contacts and tape it to the panel.