Rick,
Wayne mentioned dong a write-up on this subject in the link below.It would be very useful for lots of us if someone could find it or a substitute
Bought the Durametric but I need help understanding the numbers - Pelican Parts Technical BBS
Note that in the linked Thread someone bought the Boxster OBD2 Diagnostic Manual and found it not very useful. They come up on EBay but are for the 1997 and may not have the later supplements.They are also very expensive considering their limited utility. Fleabay item number:351406463666
I have found bits and pieces on Renntech but no comprehensive diy oriented write up.
This may also help:
Porsche - Durametric Logging 101: How to, and what to do with it afterwards
&
Be sure you updated the software to the latest version - it fixed some glitches.
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