Not quite a tutorial, but here's what I did.
I installed Raamat 60 on the outer panel and over the inner panel of of the front doors.
Raamat60 sound matting in front doors
Then I installed JL Audio XR650 CSi component speakers. Impressions: http://www.clubwrx.net/forums/showth...235#post104235
The OEM speaker wire run to the door was used to connect to the crossover. There are instructions elswhere to get the panel off and use the wires.