A few people have done this and I have to say my setup is great because of these two things.
1. Get the SmartStrip from Bits limited. Use your computer as the control, which means when your computer is turned the monitor and everything else will turn on. When you turn off your computer everything else turns off.
2. Extend the power button to a good location, top of cab, back of cab, wherever. Then use this button to turn on the computer.
Search the forums a bunch of people do this. It really works great (if you are in the US)