Mike, This is what I have come up w/ so far.
You have a double pole/ double throw 2 position switch. Connect one of the computer wires to one of the middle terminals, the other wire to the terminal directly below the middle one. One the other side of the switch, connect a fused 12v lead to the middle terminal. Then below that one run a lead to the light. From the light, go to a ground. This would insure that the chip is in the correct position, especially for those running Nitrous and the flip chip. The top 2 terminals are not used but should be protected.
This is apreliminary idea and has not been tried. I have yet to check the voltage on the wire that go to the switch on the original switch.