I thank everyone on the board for all the help. I finally got my cab to boot and shutdown with minimal user intervention and there is really only one problem.
My goal is to have a single button to startup and shutdown the cabinet by someone who understands nothing about computers. Bootup is taken care of but here is the problem with shutdown. In the XP control panel power options you can specify 'shutdown' when the power button is pressed. If I am in Game Launcher and press power, the program will hang and just look like windows which is a no-no plus the enter button needs to be pressed for "OK" to complete the shutdown. On the other hand, if P1 and P2 start (ESC) are pressed GL exits and automatically shuts down windows (using the Auto it run script) without a hitch. That may be too complicated for some people so what is the best solution for this?
Here's what I think I'm going to try. I am going to change the button that GL uses to exit itself to the most obscure key I can think of and at the same time wire the PC "on/off" switch to that same keypress. After thats done, I just go into power options and tell the PC to do nothing when power is pressed. GL exits and the script shuts down the PC.
Here's the final 2 questions:
1) Are the PC power switches momentary "on only when presseed" OR regular "click on/click off" switches? I Haven't tested since I'm at work...I just thought of this.
2) What is the most obscure keypress you can think of?