the way i see it is that they removed the front bezel(?) of the cd rom drive, attached a 5.75" bay cover on the top of the loading tray with a pin or something attached to the back of it to hit the button. so they just hit the bottom right of it to open it. keep in mind that removing the front bezel removes the outer button, so the pin would be hitting the actual button on the pcb of the cdrom drive. also keep in mind that hitting the button will push the whole tray out, including what was pushed, so your hand would have to move away quickly or it will block it from opening. but then again they don't open that quickly, so it probably isn't a problem. they also probably had to drill new holes in the bay to push the cdrom drive back a bit. another thing they could've done was just attach the bay cover, skip the whole button thing, and use software to open the drive.