Asus PC - Auto Power up on AC supply

Hi,
I have an Asus PC that I intend to embed within an enclosed/sealed unit (kiosk) - these units will be remotely managed. I would like the PC to automatically power/boot up when an AC supply is connected - everytime. If someone shuts a PC down by accident, I want them to be able to plug it back in again in order to restart the machine.

This is the motherboard:
E7987_P8Z77-I_DELUXE.pdf

http://www.google.co.uk/url?sa=t&rct=j&q...2k&cad=rja

The option of 'Restore AC Power Loss' doesn't work for me as this does not capture all the scenarios which will enable me to restart the PC.

How can I get a resolution to this problem? customer bios, hardware (switch) change - options appreciated....also where I would get a solution performed.

Thanks
Dan