We are from the US and will be arriving on a Princess cruise ship on September 21th, 2006. In the past in other cities we have been able to go the the city information center and find arrangements for a narrated "English" city tour. Is it possible to do this in Oslo? Is enough English spoken for us to get around on our own? Is this advisable? What is the distance from the cruise dock to the information center and are cabs or buses available. We are mainly interested in seeing the city in general. Is US currency OK?