http://forums.pelicanparts.com/showthread.php?threadid=148819&highlight=transmission+fluid
I posted this some time ago. The Porsche dealership told me that any tranny that suffers failure and has the incorrect fluid will have voided its warranty.
Will regular old ATF work - probably, will it cause long term damage, I don't know, as a shop, am I willing to risk it with my customers cars? - hell no.
AFJuvat