hey, its actually not as hard as it looks. first time around took me about an hour. now it takes about 20 mins.
its much easier to do with the door off (taking the door off and putting it back on is a bitch) but it is doable with it still on the car.
basically, take the door trim off and then take the plastic thing off. there are two gold nuts at the top of the door and two at the bottom of the door. this takes the whole window and motor mechanism thing off. once you get that off, you can get to the bolts that hold the window onto the motor mechanism thing. then you can slide the window out the top of the door.
note: be careful that you don't drop the window into the door
hope that helps