I guess this page is down.
http://www.101projects.com/Boxster/1.htm
I can't view it.
Wayne, I tried the method you describe. The one problem I encountered was that once I lifted one side of the rear and placed the stand, I started to lower the jack and the opposite rear wanted to come down resulting in the front lifting off the stand. Since I was planning on using my 6T stands in the rear, I had the car up pretty high. I placed a shorter stand under the other rear lift point and let the car down. Then I got under your designated jacking point and lifted the car to square up and get the 2nd 6T stand under the rear.
So, an extra stand or suitable block is necessary to use your method. I agree that lifting the car in the center as the Bentley shows is probably not a good idea. Especially is using an aluminum "race" jack.
Now, I see the door gaps are not quite right with the car up on the 4 factory lift points. I think I'll put that 5th stand under the cross member in back with just a little pressure, not so much as to take much weight off the rear reinforced points. Just to relieve some of the stress on the body.
I plan on having the car up for a few days.