Well, Unlike most people I was unwilling to rip apart my laptop to get a boot wire running through my car. So being lazy ol' me I found out a way to boot your laptop when you have AC Power out of hibernation.
First if you don't have this, go grab it!
http://www.mp3car.com/vbulletin/othe...hibernate.html
Puts your laptop into hibernation when AC power is removed.
1) Start up scheduled tasks in Windows
2) Create Task
3) Under General Tab make sure you have a Name and run it with "Highest Privileges"
4) Go to triggers tab and create new trigger
5) Choose daily and set a start time anytime about 5+ minutes ahead. along with "Repeat task every 1 minute or lower" if possible "for a duration of: indefinate".
6) Click ok and go to actions and create new
7) Choose "Action: Display a message" with Title and Message whatever you want.
8) Go to conditions and make sure
"Start task only if computer is on AC Power"
"Stop if computer switches to battery"
"Wake computer to run this task"
9) Click ok and save in!
Now when the time comes and it is run "or you click run" it will run it every minute or whatever you choose till AC Power is found. Then it will kick you out of hibernation mode so you can do what you need to!
Hope this helped out a bit