I did door locks not windows.
I was putting in a remote starter and saw that it not only had the controls for PDL, but it had the plug on the unit for an aftermarket kit.
I bought a cheap kit off of ebay
I had to trim the plastic tube that the door lock rod runs through, attach the motor to the existing holes below the door lock, bend up the rod and attach it to the lock, run the wires and add a switch. I was done in an hour.
I added a switch to the left side of my dash, in a switch hole by the door, it makes it easy to open the other side. its a momentary rocker with arrows mounted vertically, it was almost as much as the door lock motors but it fit well with a little bit of shimmimg to make it stay.
The motors are cheap, about $8 each. but the first few have had their rubber boots rot off of them, and the water caused them to fail.