Well, got off my arse tonight and decided to do something. Thought I'd begin the adventure of mutilating the factory loom, keeping necessary parts like speedo, cluster sensors, alternator control, starter motor control, fan control, and so on and so forth.
From this:

To this:

And the leftovers:

Might all look very simple, but I can assure you its not, everything is intertwined and joins to everything else. You need to know exactly what you can chop (don't need) and what you can't. Connectors need to be depinned to untangle the wires from the rest of the loom. Being 15 year old the plastic is a little worse for wear - things end up cracking and breaking. Working off of memory alone when it comes to reinserting pins into connectors is also probably fairly foolish. Luckily I've got another car here with a complete loom I can refer to tomorrow to ensure I haven't mixed up any positive (or switched positive) wires with grounds on the connectors - this situation would be absolutely disastrous.
Anyway, fair 4 hours work I think. The actual wiring of the autronic universal flying lead loom will be a sinch in comparison. XY goes to FD, etc etc. Merely connect the dots and loom it up.
Anywho, bed time now!