The black/white wire is located behind the actual ignition, here is a pic (from Coomer's install giude)

I found that it is kinda tough to get to these easily (you have to remove a few dash plastics ect to get good access to it), so I followed that wire through the harness and there is an easy place to access it. Directly behind your clock/stereo there is a wire harness taped up that runs strait up and down. Cut the black tape off and there is the black/white wire with a bunch of others

Just be carefull not to cut the wires when you are getting the tape off
I have big hands and getting to that wire behind the ignition sucked for me. Behind the clock/radio, there is soo much room to work
about the all time and the ACC, I need to clarify, it isn't ACC (first click, radio on ect..), it is when the ignotion is in the "on" position (second click). Why you need both, I don't know exactly. I would assume for the same reason there is all time power going to your ignition stock from Toyota

I just followed the directions and also what another member had told me (John - Mynzeyes). It works just fine with no problems.