I know it's a little out of topic, but this seemed like the best place to ask.. You guys are the smartest people I know when it comes to manipulating PC's so I turn to you cause no one else can seem to help me..

I have an Empeg system in my car and am nearly finished building a car PC which will interface with the empeg via tcpip for remote control use with LoJack, and also audio for visualizations.. The PC will do GPS among other things.. My problem is, I can't seem to find a way to shutdown windows via ignition.. So far I can get the ignition down to a low current 5v, but what to do from there is puzzling me.. Does anyone have any info on how to accompish this? Again I apologize for it not being specifically related to the empeg.

Daniel...