The dealer should reset the light.  I have the Durametric device and have used it for many years.  As my car is an early 997 I have worked with Duram (his first name) in the past to test his updates and changes.  Interestingly I worked with him on resetting the service light on my 997.  There are lots of good applications for his product and he does a great job keeping it updated.  Perhaps you have a few other porsche drivers in you area and you can go in on it together.  I work on my car often and so I like to have such tools around.  Also I am a bit of a tech geek and tinker with the software myself.  Interesting stuff going on in there.

Good luck getting the dealer to reset the light for free.