For the switches I'd use the analogue earth..

Cal 2 is to enable a second map, we have one for carless one for s/u

Gearcut - for flatshift on a sequential box, various ways of activating, still the best is a spring loaded gearlever which incorporates a microswitch, you can of course use a load cell... neil from geartronics sells something along the lines you would need if your going flatshift...

http://www.geartronics.co.uk/tension-switch.htm

ISS is inter cooler spray system, used as an addition to Wat Inj, the ISS runs onto a spray bar mounted above and in front of the Intercooler...pic below:-



Group A esc ran two fans, conventional WRC in the UK ran 1 rad fan, I only use one rad fan output...

TPS we use on the WRC car for interaction with the diff controller, to enable the diff controller to know when you are off throttle...

HTH...