HI Shaun,
- 2 new power configuration (full power and energy saving) were created automatically and are fully customizable on my ACER ICONIA W4-820.
Setting remains after complete reboot.
After first reboot (enabling in system "CSEnabled" to value 0), you must set the action on the "power button", "close cover", in the "advanced power parameters", save it and reboot. (complete reboot, not fast reboot).
I do not have Asus transformer T100,
I do not know why it does not work on your T100.
This is probably due to the T100 UEFI BIOS.
Good luck and Regards.
Robert