Well my injectors and my new FJO injector driver have been sitting around for a few weeks awaiting install and I decided to start tonight, so here we go.
Disclaimer:
The method used here was intended for my use, I assume no responsibility if break something using this method.
This method was intended for the FJO injector driver, but other injector driver installs I imagine would be similar, if not identical.
I went with the FJO injector driver, as it is a 4 channel driver and more economical than the AEM unit.
For starters, as always, disconnect your battery.
Remove the fuel rail and injectors.
If you are upgrading from factory injectors, make sure you take out this "O ring".
Comparison of factory injector to a Siemens 875cc injector.
If you are using new clips, mark them positive and negative.
Find a mounting place for the injector driver, I mounted mine here
The black wire coming from the injector driver is the ground, ground it.
Here is a wiring diagram and pic of the wires
Start soldiering the negative leads from the injector clips to the white/striped wires from the injector driver
Be sure to use wire shrink wrap to keep the connections safe from the elements

I was doing a bunch of other soldiering today while finishing up my fusebox relocation, and for some reason my soldiering iron gave out after soldiering 1 clip to the injector driver, so I'm going to have to stop here for tonight until I get another soldiering iron.
Stay tuned.