Thanks lil bastard !
Unfortunately the motion sensor does not come with any wiring instructions, let alone specific instructions for porsche. I can't believe nobody in this forum has any concerns about their car being stolen... Maybe because i had some bad experiences growing up in Europe (Belgium) where car theft is more common, plus the fact that my very first car, a second gen. VW Golf got stolen - i am a bit more "paranoid" about it.
i"ll call my local dealer here in Dayton where i go for oil changes (The Garaj)(
http://www.thegaraj.com/), he is specialized in Porsche and mentioned that he has done those alarm additions for other clients... Guess that's my best bet before i screw something up !
BartMan.