Right Gary, I think camber plates in the rear would help as you can't adjust the top mounting of the shocks, but you can do that in the front. After a lot of research last night I think I've concluded that toe in the rear was more important than camber, so the alignment tech dialed in the toe perfectly and then just got the camber as good as he could... It's a compromise no matter how you cut it.
The ROW alignment specs are on page 0-70 of the General manual from Porsche.
Here's a link to a post that has all of the specs in it:
http://www.renntech.org/forums/index.php?showtopic=9652
Kirk