I had the same problem as most skyline drivers. The best fix for the squeeling brakes is to go and buy a couple of cans of brake cleaner and some crc anti squeel (red silicon).
1)pull pads and anti squeel shims
2)clean the shims, pads, pins and caliper with the brake clean. (make it all look like new)
3)roughen up the surface of the rotor with some 80grit sandpaper and do the same to the pads.
4)on the REAR ONLY use the crc anti sqeal, put it on the back of the pad and down the outside edges of the pad. (the rear pads have a lot of lateral movement and by doing this it minimises this movement and therefore less sqeeking).
5)Put the brakes all back together.
I use bendex advance as they are constructed from organic material rather then metal.