So, I've decided not to use the information I received in the film. I will post it here instead.
The source is close enough to know the truth, but is only a single source. They said that in the UBOC tourney that Joe Reitman won, it was actually UB pro Gary Debernardi that took over at the last 3 tables when it was down to 20 players. He either ghosted or outright made all play decisions including the TPTK vs bottom two pair call. It is not known whether the tool was being used but seems probable it wasn't for at least this portion of the tourney. It was also not told to me whether AD actually played the 1st several hours.
I have had a lot of conversation with Joe and he maintains he played the whole thing. I like Joe, but have to remind him he is a thespian by trade with some ability to act. I personally believe the source, though have to remind them that ghosting/coaching did not have the same stigma in 2006 it has today.
The reason I am not putting it in the film is a) single source and b) all three or four people in a position to know the truth could easily decide perjuring themselves would be a low risk proposition in a defamation case and thus I didn't want to jeopardize the film over this minor bombshell. Most people I have spoken with have never believed AD on this issue and now we at least have a name to pair up with what happened.