
auto power on mod if you solder on a small electrolitic capicator between the top and bottom legs of the power switch as soon as the xbox is powered from the mains (or 12volt psu) the xbox will power up.
the cool thing about this mod you can turn it off and back on afterwards this mod works well with a timed power plug for a great alarm clock with a startup play list from xbmc4xbox

If you have a mod chip that has a long press to enable the chip installing a larger capicator may be required to old the signal to boot from the chip or you may need a smaler one to not select the bakup bank for example with the x3 chip.
typically i use a 47uf 16volt cap and it works well.
led mod:
on the bottom picture you will see two common leg led's and these may be changed to customise your console ring of light.
eject/ power button swap:
if you wish to use swap the eject and power buttons over you can by switching the yellow wires over on wires 2 and 4