Jon, Why would you ever want to replace the carpeting, strip it instead so that the 930 will be lightweight, while you're in there you cant take out the back seats too.
I think for replacing the carpeting, you need exact measurements and cutting of the carpet. There is a recommended professional adhesive that is used(I will check on the name of it) but all you have to do is glue it down properly. That's how a friend of mine who changed his explained it to me. He said the key is getting the carpeting cut right to fit the mold of the 911 precisely.
Steve, glad to hear that you finally got the cd player in there. What about the car phone ?