borion:
You're certainly right about getting on with our lives. I personally find it depressing to view the non-stop coverage of this subject...and now as one other lister pointed out...to see some of the media apparently exploiting it.
To answer your questions:
1. The manuals ARE bad. Of all the cars I've owned, my 964 manuals are far and away the absolute worst. You may want to subscribe to AllData (www.alldata.com) for assistance. I don't recall any photos related to sensors but they do provide decent information as well as TSBs and it's only $20/year.
2. A place on the web?? Not that I know of. If you find it, let EVERYONE know. The best I can find is this site, but they don't identify the parts, just blow up diagrams:
http://www.msroadrace.com
They have diagrams for a LOT of 911s, FWIW. Click on the picture of the keys at the bottom once the page loads.
3. The manuals CAN be (sort of) deciphered, but you'll need to trace through some of the DME related circuits.
What brings this on? Are you getting a "Check Engine Light"? Do you have other problems?
Best Wishes,
Bill Wagner