[woodsman]

A common cause of cold-start problems is water in the fuel tank. Water collects over time (years) and sits on the bottom of the tank (where the pump pick up is). Once below freezing ice forms and blocks the fuel until it's saturated. In climates used to cold weather fuel line antifreeze is used as well as products that eliminate the water. On some vehicles I've owned I used to occasionally fun them down to fumes to get rid of this but doing that in a Boxster will probably cook your fuel pump...