The reason why I asked the question was that my flight plan had a STAR leading to RWY 4 at LIPZ. Since PF3 does have a key press(esses) for requesting a different runway while communicating with Approach, my question was therefore answered. I guess if Approach had given me vectors when I was much farther away from the airport, before entering my "STAR" start point of the flight plan, then it would have been more normal for me to change course for a different runway than what I had originally planned in my flight plan. If my thinking is wrong, please correct me.