Do not pack too much. You will be moving every couple of nights and moving your own bags around the place, which after a long day's trek is no small feat. The packing list provided is not comprehensive so think along these lines for the actual trek:
1 - walking trousers: usual ones that you have and not salopettes. Also bring some waterproof overtrousers for armth and of course if it gets wet or too snowy. Don't bring more than 2 pairs of walking trousers. Also bring one pair of thermal long johns.
2 - base layer top x 2
3 - walking socks x 3 (yes, that means more than one days wear)
4 - microfleece x 2
5 - down jacket: this iwll be needed for the lunch stops and if the windchill gets silly
6 - lightweight waterproof jacket - I brought a ski jacket shell with me which was fine but I wish I had taken something lighter
7 - invest in a good rucksack, with 2 straps from the lid (you'll need these to strap your snow shoes when you are not wearing them). Your rucksack will be heavy, filled with layers of clothing that you will put on and take off, packed lunch, water, flask (you'll crave a hot drink at lunch when it gets cold cos you've stopped moving), sun screen etc.)
8 - hat, gloves (a liner glove and thick gloves), snood or buff, sun hat/cap
9 - sunscreen, lip balm
If you don't eat much bread or cheese, like me, then you won't love the packed lunches. The quality of the packed lunches really depend on the gite your're staying at (Gite 1 is the best for packed lunches and dinners in my opinion). If you have room to bring some fruit with you e.g. pots or some apples etc then do so...I wish I had as the one thing you can't get hold of is fruit (not a great deal of veg either).
I have an old running injury on one of my knees, and although I had the right fitness, my injury did play up due to the terrain (which has never been a problem on treks before) so do bring your anti-inflammatory drugs, tubigrip etc as you may need it.