Putting non-RFT winters on mine next week. Ordered the small spare and jack from the dealer. A little concerned it will take up a bit of space in the trunk, but guess I'll have to make my wife pack more economically (or lose my allocation -- more likely). Plan on bungying it down as well.
Also purchased the Continental ContiComfortKit. http://www.tirerack.com/accessories/detail.jsp?ID=38
Overkill? Perhaps, but when travelling across Europe I want all the options possible.