well most squeal can be cured with:
installing the factory anti squeal shims
using copper grease, or the special anti squeal paste
champhering the edges of the pads if not done from factory
re-bedding them in
but, I have a set of pads. Endless CC-R, and they squeal no matter what. Hot, Cold, New, Old with shims, without shims they are just a noisy pad. you shouldn't have that problem with ultimates though.