I can try to explain the wiring...when I have more time (ie: when my 1 1/2 yr old leaves home ) I will try to put up a proper diagram.
It's pretty simple really. This is all for a series 1 R33 GTST with external igniter, I have no idea about compatibility with other models.
Where the coil loom plugs into the igniter, there is another connector (with 2 wires - one thick white one, can't remember the colour of the other one) that joins into the loom. The thick white wire is the power (+12v) for the coils, and this just daisy chains from one coil to the next.
The other wire coming from the 2 wire plug loops into the cylinder 1 signal wire (I think it has something to do with monitoring timing).
There is a ground wire that connects to the back of the head and then to each coild pack. This again is a daisy chain affair, so just loops between each coil.
The only separate wires that run to each coil are the signal wires (which tell the coil when to fire) coming off the igniter. There are 6 wires coming out of the igniter, so obviously one to each coil. I can't remember the order at the moment, but I will have a look sometime soon and post the order. If you disect your factory igniter to coil loom you will be able to isolate which wire is for which coil.
The earth wire becomes redundant if you are mounting the coils on a metal bracket that connects to the chassis of the car as this will earth all the coils anyway.
I will post diagrams and more details when I have time.