If you're having problems folding a Veterans Casket Flag, you can either take it to your local American Legion or VFW Post and ask them to please fold it for you. Please watch the video below. Ceremonial Flag Folding.
The 3d U.S. Infantry Regiment (The Old Guard) gives a detailed tutorial on how to properly fold the American Flag for ceremonial purposes. The Old Guard is the Army's official ceremonial unit and escort to the president, and it also provides military funeral escorts at Arlington National Cemetery, Va.