Check out
http://forums1.roadfly.com/porsche/forums/boxster/. There are quite a few people with your same problem - many of whom have had Porsche help them out. The most common help I have seen is that they buy the engine and you pay the labor. It's still a couple of grand - but better than nothing. Others have received full payment while still others have gotten nothing. I have no idea why. Good luck!
And SD987, I wouldn't consider it
ranting until you've had a Porsche engine fail out of warranty. Nothing like facing a $13k bill to put a dent in your week.