LOL at 'necroposting'. This topic was from 2007.
You absolutely can get through this area without knocking them out OR killing them. Check out the links in the second post in this thread. It takes a lot of patience, trial and error, skill and just plain luck to do it without KO's (see the DanielHac video link in the second post for proof).
I can duplicate the sticky-cam method, but too often I don't get the camera placement/timing just right. I usually go for the super-stealthy run-n-grab then 'stealth KO' and hide body method (see my walkthrough link in the second post for a description) which gets you the elusive 100% with all zeroes (0) in your stats.
Obtaining that goal is a Splinter Cell addicts mandate and we just plain can't play these games without achieving it. If you're not a true addict of the stealth genre, then knockouts, kills and perfect mission stats mean nothing so play it the way you enjoy - that's the point, right?
Official member of SCAA
(Splinter Cell Addicts Anonymous)