Eggs are always best if cured first, but if you get some eggs that have been frozen first, they can be salvaged if you slowly unthaw them (in the refridgerator) and cure them with a brine cure like the one on the tips section. They won't be as good as fesh cured, but they will not be mush either... don't unthaw at room temperature and don't use a cure such as pro-cure on them.