I just got the first of the 'Alien Archives' discs from meedermow (cheers fella!) - the 'Shock and Awe' doc is well worth a watch, particularly as the actual process of making the Alien DC is hardly documented at all in the Quadrilogy.
Just out of interest I had a look at the version of Giger's Alien included on the disc - it actually appears to be a PAL conversion of the NTSC copy I have. I guess the original compiler decided to convert it in order to get it on the same disc as the PAL 'Shock and Awe', but it's at a certain cost to the image sharpness - the Ebay NTSC laserdisc copy is still the best I've seen, no doubt until the official disc suggested by Jiri comes to fruition. I have to wonder though, is handheld 16mm EVER going to look that great?