Only one more thang to do. STir Stir Stir to try and dissipate some of the sulphite and make a starter using 1 cup of water, quarter tsp nutrient, half cup of the must, Lalvin EC-1118 yeast. After 24 hours, add a cup of the must. After 12 hours, add 2 cups of the must. 12 more hours, add a quart. 12 more hours, add a half gallon. 12 more hours add a gallon, etc. You get the idea. It will work. You need another primary fermentation vessel to do this, so that when you get a huge starter going you will have something to put it in. When the starter is at least one-fourth as big as the entire batch, preferably a third, mix the rest all together.
Make sense? Start stirring.