That is a very interesting idea, ABC. I don't know if I have the necessary skill with audio to make something like that work, but I would like to hear it if someone did. I've been toying with the idea of making isolated scores sourced from your remastered versions to synch with the dvd's, but that wouldn't be for a while yet. Some time ago I made an isolated score track for Alien using the Intrada cd release, mostly because I wanted to be able to see the film using the music as composed and not the appalling hackjob of the official mix. Gave some thought to trying to replace the music in the film itself, too, but it turned out to be rather difficult. I might go back to it at some point . . .
Anyway, after taking a bit of a break, I've finished with the LFE channel. All that remains to be done is to make a test file so I can hear the bass effects integrated into the film, and then make any tweaks to the volume levels as needed. After that I'll upload the files! Hopefully it won't take long for the 5.1 upmixed version to be made after that.
Synching sound files to each other can be a major pain . . . I'm glad that part is done with. I ended up using the bass from the 1997 version more often than not, because it usually sounds closer to the original; though there were instances where I thought the 2004 effects sounded better, so occasionally I went with those instead. There may be a few instances where a particular bass effect was not actually in the original soundtrack, or was mixed differently than either SE version, but I've tried to keep it as authentic as possible in spirit. The volume levels are basically my best judgement of what sounds right. Sometimes the SE's have really loud bass in strange places that don't warrant it, and can be surprisingly subdued in others. In general I've aimed at making the bass powerful, but not to the point of being overwhelmingly loud.