Ok to answer questions, S2000 pushbutton was easy here is the wiring diagrams I made for it:
wiring the relay into the column
the back of the button, the wiring harness that fits is the power one from an old floppy drive.
how it looks mounted in the dash. It fit where the cigarette lighter was on 95+ stereo surrounds. the way I wired it turning the key still works and you need the key for the button to work. but you justhave to turn the ignition on and hit the button, or just turn the key like normal.
the grill was an ebay special for a 04-05 F150. I just trimmed it down to fit the grill shell of the ranger. I got the grill for $40 but that was almost 2 years ago so it probably costs more now.
The plans for the datsun include a big boost in power. It is getting a VQ30DET, turbocharged 3.0 V6, with some upgrades to get 450hp at the wheels. 6 speed from a 350Z, custom widebody, APR GTC300 spoiler, upgrade brakes, full roll cage, and some other stuff.
Not single anymore guys, Been married since october.
*edit* for the power/ ground for the start button I just used the cigarette lighter wires that were right there.