I've got a line on an older film that I've been looking for for a while: "High Road To China" (http://www.imdb.com/title/tt0085678/) starring Tom Selleck.

Unfortunately the primary audio track is Russian (?) 5.0. The English track is only 2.0.

As far as I can tell the non-English track is only an overdub in the center channel leaving the L/R/SR/SL clean and untouched (including English dialog that can be heard ambiently).

Am I crazy to think that I can take the 2.0 track, mix the channels together 50/50 and use it as a replacement center channel to create a new 5.0 mix in English?

For the life of me I can't figure why it wouldn't work. Using something like Sony's SoundForge to mix the L/R of the 2.0 mix, decode and extract the 4 useful channels to wave and then re-encode the whole thing back to DD.

Thoughts? Interest? Advice?