Ha ha! Yeah, that would be cool. I'm pretty sure the
CAN BUS has a few extra measurement devices plugged into it throughout the car on FPVs. I've heard people getting these things to show up on standard sat-nav ICCs - but you don't get any readings.
Still, there are ways to emulate all that's required.
I'm just not sure how much space is left on the non-sat-nav ICCs (there's plenty on the sat-nav ones which have a 1GB chip ~450MB free). 128MB on the non version, and almost totally full.