Wine Yeast and Nutrient Guide
There is a guide titled "MoreWine's Guidelines to Rehydrating Active Dry Yeast and a Recommended Nutrient Regiment" that and be found at MoreBeer.com under the link for MoreWine. It is an very helpful guide that I think will be worth your time to read. It discusses the types of nutrients and dosages to use. The guide as well as several others on wine making and additives is free to download.