Xtreme realistic cockpit (how to build one)

Are any of these posible?

My main computer runs all the graphics while 2-3 sub computers (connected via gigabit ethernet) display the gauges?

I want to modify a keyboard by soldering wires and extending buttons and switches as external realistic controll panels. is there a mod that will allow not just a momentary push button to control things but instead, use a latching switch (eg. switch = open > gear is up, switch = closed > gear is down)?

is there a way to use potentiometers (rotary dials) to change Com frequiencys? maybe by using joystick port?

can i send strings of data containing g-force, tilt (X), yaw (Y) to external programs or devices outside of the FSX application?

what is FSUIPC full functionality?

thanks.