I can only agree with Moth3r, what you have done is nothing short of astonishing, IMO you found a perfect balance! my only gripe is the lack of spitting sound ;) and the LFE addition when the Falcon comes out of hyperspace, but then I am nitpicking to the extreme.
I must say though that my receiver actually do a better job at upmixing in Dolby ProLogic II, my homebrew 2.1 and 2.0 sounds better to me than the 5.1 track in terms of separation, much more clearly defined somehow which I find a little weird, but I guess it can vary dependant on what equipment you have.
Love it, hairy_hen! it is so professionally done that I think you actually need to begin work in the business. And you need to do some homework... Apocalypse Now, one of the greatest films ever made in my opinion. Go see it, now! ;)