Was everything (windows) working before the stereo was installed? If they were, then, they messed up something in the console wiring. The windows are fused in pairs. Opposite corners together, ie. R front and L rear. If nothing works and the fuses continue to blow, there is a short in the console. If, as you say, they work from the rear window buttons and the fuses don't blow, then the wiring in the console is definitely messed up. BTW, which fuse is blowing? And, if it is blowing when you turn the key, then how are you getting the rear windows to operate? I'm a little confused by your description, but that's OK, because I'm always a little confused about something, or so my spouse tells me.
