Hello,
What did you ever find out on this?  I have a set of  Porsche GT2, 996 Turbo 2001-2004 seats I am going to put in another vehicle and I need to figure out the wiring.  Also trying to figure out how to tell if they are heated or not.
If I can't find a good wiring diagram I can buzz it out and figure out what is going on.  My main problem right now is there is an electronic box on the bottom of the driver's seat.  The bit of research i have done so far tells me this is the controller for the seat memory.
I'm wondering if the switches can handle the current draw of the seat motors, or if I need to wire up some relays, or if there is a way to use the existing controller.  
Here they are.
 
Thanks for any info you guys can give me on these seats.