clayton.verellenIf it's only going to be a few weeks I would get some dr schools women's insoles (narrower fit for ski boots),
Do not do this, it is a waste of money. What your foot needs is support, not gel or squish. Dr. Scholl's inserts will allow your foot to move and slide more in your boot because of the unstable nature of the insole. Only a supportive footbed will properly hold your foot in place and properly control the amount of movement your foot undergoes while skiing. Get to your boot-fitter and have him assess what your foot needs. You say you have a flat foot, but since every human foot is made up of 3 main arches, you most likely have a very flexible foot that becomes
flat when it is not in a neutral position. Your boot-fitter should assess what footbed will be the best for you and provide you with the proper solution for your needs and budget (at $200 most every type will be covered)..