Thanks, Nigel. I tried this nestling process, but without total success. When I drag the second Vegas file into the already-open timeline of the new master project, the several video tracks in the second file seem to get rendered into a single video track in the new master, which is fine; but the same thing doesn’t happen with the audio tracks – only one of the several audio tracks opens in the master timeline. How can I get the audio tracks to render to one, also?