To get all the windows down at the same time:
Using the driver's door keyless entry reciever do the following:
1 Unlock the car (if it is not already unlocked)
2 Lock and hold the button for 5 seconds
3 Unlock and hold the button, the windows will come down.
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record