Use any remote switch and simply hook it into your start button.
www.maplin.co.uk do them for about ten quid.
I was thinking if it would be possible, instead of actually getting inside the car , starting the car and moving back the seat , opening the laptop and pressing the on button, that i can actually hook up maybe like an alarm type remote. So that it would work just like a remote start does on a car but instead only on the laptop. I no this is possible, i would just have to find the perfect parts and what not. If anyone has done this or would have any ideas how, i would really be thankful.
BTW i already tried searching.