First off, this is clearly my edit that you made a few additions to, which I’d’ve appreciated if you’d at least mentioned. Overall that choice was detrimental because it gave you a lot less to work with when making your alterations.
The encoding is pretty bad, and that could have been avoided if you’d built it from the ground up. I’ve never heard of this Power Director software you’re using, but if you’re looking for a good, free editing software, I’d highly recommend Davinci Resolve. I don’t use it myself but I’ve dabbled in it, and it’s incredible; Adobe Premiere level software.
A great deal of your additions were worthwhile, but a lot of them either had jumpy sound work or no sound at all, such as the new shots in the egg silo and Sigourney Weaver’s screen test. You can get the full screen tests with audio off the Quadrilogy DVD, or the Blu Ray set. There are great sections where the audio is off sync as well.
You also had some widescreen footage set in 4x3, that could have been cropped off properly.
Overall it pains me to say that I’m not impressed, but I would love to see you do better work in the future! If you have any questions about anything I would be glad to help!