i start of by pullin off the fenders and bumpers and then start deloomin all the old wire looms and the old electrical tape and pull all the wires behind the firewall. on the driver side theres a lil hole that is pluged up with a little ruber plug (next to the sunroof drain hose if you have a sunroof) pull all the headlight wires though there. and your gunna need to extend thoses two wire comming from the mastercylinder. then if you have a resistor box i usually mount that behind the firewall as well to. or under the intake mani. on the pass. side i mount the fuse box up and behind the glove box or you can just do it right on top of the ecu. and do the same for the headlight wires.
but since DAs and EFs maps are located on the outside firewall it gets a bit more complicated and i will have to use pics for that..
i hope that helps out a bit

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i will do an actual write up next time i do one.