How to turn off iPhone 3G without using power button? I've looked up various answers, but none of them worked. One involved squeezing the corner near the power button while pressing it, the other involved going into Settings > General > Accessibility but I don't have Accessibility menu for some reason. 

I need to turn the phone off to jailbreak it. Anyone know of other methods? Perhaps a command in cmd might turn it off?
Yeah, I looked at what redsn0w asks you to do, and it needs me to press the power button again during the process of installation. I guess I can't jailbreak my phone =/