Good for him.
I've yet to see a 9/11 Truther actually attempt to systematically address the content of any of the critiques, nor put together a scenario that even attempts to be a comprehensive explanation of the events leading up to and including the 9/11 attacks (such as the actions of Osama bin Laden and the hijackers, described in the 9/11 Commission Report, Gerald Posner's Why America Slept, James Bamford's A Pretext for War, and elsewhere). Instead, their methodology resembles that of creationists and Holocaust deniers--identifying apparent inconsistencies, and constructing a fantasy around them without any regard for the enormous collection of facts at hand. Their defense then becomes progressively more delusional attempts to explain away the contrary facts that they've not bothered to address.
The "Screw Loose Change" annotated version of the "Loose Change" 2nd edition video may be found here.