I think the only way to accomplish this practically would be to have a live switch on your two cameras, and have someone live switching them to a recording device that burns directly to DVD. This is one chance editing and requires two good camera operators and a guy switching..
If they dont buy the DVD; at it to your demo table.
In your scenerio there would be no time to edit together a multicam shoot; preview videos and then burn them. IMHO.
I would also add a sound man, to capture the Audio from dedicated mics, and feed that one signal for use. You still will have the issue of the continuity of the Audio, should you edit the Video. Just something to think about.
If you use the Audio from two cameras, the Audio will reflect the different positions (and any mic. irregularities), and will seem to jump about.
Doing this live will be a challenge.
>editing process MUST NOT interfer with the continuing video capture
As far as I know... Impossible with Premiere, since Premiere must have ALL the computer's attention while working... so you would have to have a separate computer, with transferred files, to do anything with Premiere and then Encore for disc burning
I am figuring on THREE computers at least, possibly four to do this job. Just looking suggestions.