I've tried to install this mod several times. I have decent DSL, but your download takes over an hour. And that was at a constant download speed. The main problem I have found is that all of the ships are invisible, not just the Terran ones. The Terran ship fix extracted normally, but had no positive effect in game play.
My whole-hearted suggestion to you - break this download into smaller chunks. I get 7 megs/sec normally. My guess would be if you broke this mod into individual folders or groups of folders this download would take a fraction of the total time. The 1 gig+ size turns almost any connection short of fiber or cable into the internet analogue of LA's 405 during rush hour. It would also allow you to more easily find problems in the total mod download as a whole.
One thing I did notice as I downloaded this file - several times - was the exact same files wound up broken over and over again. The effect these files have on the extraction is quite noticeable. The extraction goes in order. Once you run into one of these files, nothing else in the corresponding folder copies over whether it's good or not. It means you have to extract the majority of the non-broken files manually.
Other than that, your mod works as advertised, including the majority of the movies. Fix the all-invisible-ships, the broken files, and include smaller multiple downloads as an option (say break it down into 250-300Mb chunks). Do that, and you have an absolutely kick butt mod.
On a side note, you guys ever thought of doing a Robotech mod? Not sure the concept would port easily to GC2. But from what I've seen so far, you would be fairly up to the task.
