Just a few words about the 70mm scans--they are taken from a commercially-sold line of 70mm frames that was offered in the mid-90's. For like 20 bucks or something you would get a 70mm frame mounted on a piece of glass. I can't remember the source that these were taken from but there was a special print made in 70mm just for the release. They then made series for ESB and ROTJ if I recall. You could order them from the Jawa Trader catalog in the Star Wars Insider, and they were of course very limited. I'm quite certain thats where these stem from. Someone just collected them all and scanned them. The scans by the way are very bad, you can see there is video noise everywhere and it often makes it difficult to judge the detail and grain level when you blow them up; these have been floating around for a while now so maybe they were made with older, cruder scanning hardware. I think there was a page on the net somewhere that explained where these 70mm frames came from and how the print was made.