RE: SD with Winny
SD is typically a wet compound, and Winny a dry compound. As Adil quite rightly pointed out both are methylated and therefore toxic to your liver, so you should be researching about all the possible side effects of running such compounds. There are many articles on this board which will highlight those dangers, as well as ways of minimizing the risk as much as possible.
To answer your question, and to minimize possible problems from arising, I would suggest something like the following:
Weeks 1-3 SD 20/20/20
Weeks 3-7 Winny
You'll need to research Winny to find out what the recommended dose is as I don't know it off the top of my head. This cycle has a 1 week crossover period, so it's 1 week where you'll be running both orals together.