I have followed your guide with my greddy turbo timer/harness and everything was the same for my B13 install, except that the accessory wire on my car was a fully blue wire, not blue/white striped. In any case, anyone with a multimeter can easily test which wires on the ignition harness are ign, acc, or constant 12v. The ignition harness wires are soldered onto the left side of the ignition switch, behind the combination switch (the switch that controls wipers, headlights, etc).
I used a universal Greddy harness, part number TT14-22M, and it made installation
so very easy: all that needed to be changed was the wire configuration on the harness connectors--no splicing, tapping, butt connector-ing, none of that BS. I'd post pics but there's no camera at my house at the moment. I will later on, though, to help people who are visual learners
edit
actual Greddy link for greddy turbo timer install/instructions can be found here:
http://www.greddy.com/tech/FATURBO_TIMER.pdf
The instructions that came with my TT were in Japanese...
