Does anyone know/have heard of a way to make the stock NAV a touch screen? How wbout even replacing the stock NAV with a new one that fits in the same place?

i don't think there is a way of making the stock nav touch screen.. even if there was, i bet it would cost an arm and a leg.. it's much easier to get an aftermarket touchscreen NAV like the avic-n1 or the eclipse..

David
04 Ivory Pearl G35C 5AT Premium 18"
Z-Tube/Popcharger, Pioneer AVIC-N1