just got done installing the 6 in the passenger and rear doors, its really easy.
you don't have to remove the entire door panel! for the front seat, simply take out the 2 screws above the pocket, below the plastic piece that holds the switches, and it comes out. for the REAR doors there's one screw in the corner of the ashtray, take it out and the switch comes with. there's plenty of room to fit the switches inside the doors from these holes.
the express down is as follows-
pin # on module and what it connects to-
1-cut red with yellow stripe wire on switch, connect to DOOR side
2- same wire as 1, but connect to SWITCH side
3-splice into the red with blue stripe power wire
4-splice into yellow wire with red stripe (window up)
5-splice into any black (ground) wire
for UP you simply switch the red/yellow and red/yellow wires, splicing into the red/yellow on the switch side of the down module
for the one wire that splices in to the opposite direction (pin4) i always connected it at the point where i connected pin2 (switch side of the other module) not sure if this matters, but it works and i didn't test the other way round.
I havent done the drivers door UP, because i dont have that module yet, but it should be the same, jsut lots of extra wires i dont touch.
if you want to only control this from the drivers door, i found that the tan with color (different for every door) wire controlled DOWN fro mthe drivers door, i assume one of the others (possibly white with color) controls up. if you splice into this wire, auto up/down works only from the drivers door, and the other 3 doors function normally. i chose to wire it so each door was auto, to give the passenger access.
note- when putting all windows down/up at the same time they're slower than normal, because of the power draw, just the same as if you hold mor ethan one switch down at the same time.