In reply to TheBigFactHunt:
Not sure on the mountain you mention, but you're quite close to Gourette, Estaing and Cauterets - the big mountains all around there make great winter mountaineering objectives, and many of the high faces and steeper ridges have technical routes. The book I refer to for technical winter stuff is 'Pyrenees Courses Mixtes, Neige et Glace' by Francis Mousel. Hard to find in the UK but you might be in luck if you visit Pau/Lourdes/Cauterets/Gavarnie.
I've also seen a new book 'Mountaineering In The Pyrenees' written in English, but it's an overview of the whole range.