Winterthur is in the north-east of Switzerland, very close to Zurich and Zurich airport. It is easily reachable from Austria, Germany, Italy and France (by train or car) as well as every other country you could imagine (by plane).
One your arrived in Winterthur, either by car or train, use the following maps to find your way to the partyplace.
Address of the location:
Phone: 0041522024685 (valid from Friday noon)
From the train station to the location (walk)
Once you arrived in Winterthur, you get out of the train and walk forward (in the direction in which the trains has been driving, at least if you're coming from Zürich, else, it's the other direction) until the last subway on the stage, walk down the stairs, turn right and walk up the stairs again. There you see some bus stops on a pretty large street. From there, you walk straight forward until you're standing in front of a big building - the "Manor". There you turn left, walk a bit, turn right the first street, and from there it is all straight forward.
Around the location (click the image to see a larger area)
Around the location, streetmap (click the image to see a larger image)
Location from the outside (try to not miss it; click for a larger image)