The plan at the moment is not to worry with connecting to the ECU, although the idea is not out of the question.
The next step is just going to tidy up the monitor connections, install a DVD-ROM drive and just basically keep it running.
With a PC in the car I do have a number of possible options in which I can go, including GPS, connecting to Nissan ECU, connecting to Piggy-Back ECU (IE E-Manage), I could even wire all of the electrical systems into the computer and run them through there, although that ain't happening! I'm open to ideas of what to do with it!!!