The rear 1/4 windows that are down have power windows. all sports roof Mustangs with power windows opiton had the rear 1/4 windows go down, all other are fixed. There is a way to make them go down, you need to get the window brackets and crank from a coupe. try this site http://www.geocities.com/MotorCity/Lot/4374/build.htm
this is what I did on my Mach 1, it is so much better.