FSLive Traffic -- Adding/upgrading A/I aircraft

Anyone figured out/have specific details on how to add A/I aircraft such that FSLive Traffic will recognize them and add them (and their flight plans) to the .bgl file? I'd like to upgrade some of their existing models as well as add some aircraft that they missed (Gulfstreams, Challengers and PC-12's being some of the most notable absent from their collection). I asked AirNav how to do this and they said they don't support it for FSX because it's too complicated. Poor support from AirNav? Yes, I know...shocking. =) I'm sure there's some work involved but I can't believe it's that hard. Thoughts?Thanks!Scott