Has anybody changed the shitty old orange cluster lights and centre dash lights,Easy or hard,is it worth doing?

 

On the gauge cluster, the orange color is from the gauge, not the lights.Only way to change it is to change the gauge overlay(mad JDM tyte yo!). You "can" get color bulbs to fit the cluster, but the orange filters will alter the bulb color(still be orange regardless of color bulb) unless you change the overlay.

As for the Heater/AC control, you can change out the blulbs in it aswell, But I think it has orange filters inplace for the color.