Guys, the DEI 530t will do one touch up or down. It's a simple plug/splice in that is voltage sensitive, meaning that it senses obstruction of the window such as the frame or someone's bodyparts, which is how it determines when to stop driving the window motor. With the time and $$$ invested in hacking the Nissan switch, you could've bought the unit, installed it, and had a lifetime warranty on it.
Just my two cents, but why re-invent the wheel when someone else already did the legwork for you????
Will ship 530t's at $70 + you pay shipping, a piece with necessary wiring diagram.